Journal of Jiangsu University(Natural Science Eidtion)

[an error occurred while processing this directive]

Journal of Jiangsu University(Natural Science Eidtion)

Home | About Journal | Editorial Board | Subscriptions | Instruction | Contacts Us | 中文

　

Office Online

　

　

　

　

　

　

Editor-in-chief

　

Journal Online

　

　

Forthcoming Articles

　

　

　

　

　

Download Articles

　

　

Quick Search

Advanced Search

Journal of Jiangsu University(Natural Science Eidtion)

	2020 Vol.41 Issue.5 Published 2020-09-10

	497	Research progress of disordered oxide cathode materials for Liion battery
	Research progress of disordered oxide cathode materials for Liion battery[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 497-502>')" href="#">	KONG Jizhou, CHEN Yao, XU Peng, ZHOU Fei
		The application status and research trends of disordered cathode materials for lithiumion batteries at home and abroad were introduced. Two activation methods of Li+ diffusion channels in disordered cathode materials were discussed. The Tibased (LiMTiO) and Nbbased (LiNbMO) disordered cathode materials were classified. The effects of preparation methods, optimization of parameters and modification on the electrochemical properties of disordered cathode were reviewed. The stability performance and chargedischarge mechanism of the two types of disordered cathode materials were compared. In view of the current problems of the disordered cathode materials with general capacity retention rate and poor rate performance, the modification methods of surface coating and ion doping were proposed, and the novel chargedischarge mode was also discussed. The future research directions of disordered cathode materials were prospected.
		2020 Vol. 41 (5): 497-502 [Abstract] ( 58 ) [HTML 1KB] [ PDF 1273KB] ( 511 )

	503	SOC estimation of battery pack based on PF-RLS
		LI Guang, LONG Yin, ZHU Hao
		To solve the problems of amperehour integration method for battery packs with inaccurate state of charge (SOC) estimation due to sensor accuracy, battery aging, integration error and initial value, the parameters of SOC initial value, nominal capacity and integration period of the traditional amperehour integration were improved. The firstorder RC equivalent circuit model was established based on the internal relationship between the SOC and the open circuit voltage (Uo). In the circuit model, the Uo was extracted and updated in real time by the recursive parameterfree least squares (PFRLS) with forgetting factor. The temperature with crucial effect on Uo was considered, and a threedimensional model of SOCUoθ was established to provide an accurate initial value for the improved amperetime integration method. Based on the inconsistency of battery pack, the maximum voltage and the minimum voltage fusion algorithm were proposed， and the federal urban driving schedule（FUDS) working condition detection and the real vehicle working condition verification were carried out. The results show that the accuracies of the PFRLS online extraction of Uo, the single cell SOC and the battery pack SOC algorithm are respective 2.55%, 3.20% and 4.00%, which meets the technical requirements of QC/T 897—2011 battery management system for electric vehicles claim.
		2020 Vol. 41 (5): 503-508 [Abstract] ( 49 ) [HTML 1KB] [ PDF 4161KB] ( 436 )

	509	Effect of variable phase parameter coupling on gas path state of diesel engine
	Effect of variable phase parameter coupling on gas path state of diesel engine[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 509-515>')" href="#">	WU Xueshun， DU Defeng， LI Juntong， HAN Zhiqiang
		To investigate the coupling effects of unit additional lift duration angle and unit additional lift peak value with the original valve type line peak interval angle on the gas path state parameters, the DK4A diesel engine was taken as the research object, and the different valve type lines were introduced to simulate under the engine speed of 2 800 km·h-1 and 50% load condition.The effects of unit additional lift duration angle, additional lift peak value and original valve profile peak interval angle on the weight of gas path state parameters were analyzed and discussed. The results show that the interval angle between the unit additional lift peak value and the original valve profile peak value is from 100° to 140°, and the additional lift duration angle is from 92° to 132°.The increases of the additional lift peak value and the original valve profile peak interval angle are beneficial to the increase of the influence weight on the air path state parameters, and the influence weights of the unit additional lift peak value and the original valve profile peak interval angle on the change rate of air inlet state parameters are greater than that of the unit additional lift duration angle.
		2020 Vol. 41 (5): 509-515 [Abstract] ( 37 ) [HTML 1KB] [ PDF 3432KB] ( 521 )

	516	Analyses of gasliquid twophase flow and pressure fluctuation during startup of municipal waterlogging selfpriming pump
	Analyses of gasliquid twophase flow and pressure fluctuation during startup of municipal waterlogging selfpriming pump[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 516-522>')" href="#">	YANG Bo， PAN Zhongyong， Ibra FALL
		To explore the selfpriming mechanism of selfpriming pump, the external mixing selfpriming pump was taken as the research object. Combining with grid slip technology, the unsteady numerical simulation of the selfpriming process was carried out by the VOF twophase flow model and kε turbulence model in CFX simulation software. The distributions of gasliquid twophase volume, liquid phase velocity, outlet void fraction and pressure in the pump at different times were analyzed. The time step and the total time of unsteady state simulation were changed to monitor the pressure change in the impeller and volute during the selfpriming process. The results show that the suction and exhaust of the selfpriming pump are mainly concentrated in the early and middle stages of the startup process, and the air contents in the impeller inlet and pump outlet are more than 60% and 75%, respectively. The gasliquid mixing zone at the impeller outlet leads to the flow disorder phenomenon in the large area from the impeller outlet to the inner side of the volute, which reduces the work capacity of the impeller and affects the normal exhaust of the pump. The pressure fluctuation amplitude of the monitoring point of the impeller is related to the distance from the blade working face, while the pressure fluctuation amplitude of the monitoring point in the volute is related to the distance from the outer edge of the impeller.
		2020 Vol. 41 (5): 516-522 [Abstract] ( 48 ) [HTML 1KB] [ PDF 7447KB] ( 672 )

	523	Instability analysis of liquid interface under needle plate electrode action
	Instability analysis of liquid interface under needle plate electrode action[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 523-529>')" href="#">	WANG Xiaoying, WU Shibo， WANG Dongbao， WANG Zhentao， WANG Junfeng
		The deionized water was used as discrete phase liquid with biodiesel as continuous phase liquid. According to the interface stress balance, the dispersion equation of discrete phase liquid under the action of needle plate electrode was established, and the characteristics of the interface wave dominating the breakup of discrete phase liquid were analyzed. The microhighspeed camera technology was used to visualize the interface morphology of charged deionized water in biodiesel to obtain the breakup mode and formation mechanism of the discrete phase liquid. The results show that the breakup modes of deionized water in biodiesel can be divided into drop mode, swing drop mode and coneswing jet mode. The observation results of the interface wave characteristics in different modes indicate that in the drop mode, only the axisymmetric wave exists on the interface, while in the swing drop mode and the coneswing jet mode, the axisymmetric wave coexists with the nonaxisymmetric wave. With the increasing of charging voltage, the optimal wave number of the axisymmetric wave and the nonaxisymmetric wave is increased. The optimal wave number of the axisymmetric wave is larger than that of the nonaxisymmetric wave, but its growth rate is slower than that of the nonaxisymmetric wave.
		2020 Vol. 41 (5): 523-529 [Abstract] ( 31 ) [HTML 1KB] [ PDF 4848KB] ( 584 )

	530	Experiment on anisotropic wet etching characteristics of sapphire
		ZHANG Hui, XING Yan
		Due to the complex anisotropic etching characteristics of sapphire, it is difficult to predict and control the etching evolution process and results. The crystal etch rate anisotropy of sapphire was obtained at (245±3)℃ and V(98%H2SO4) ∶V(85%H3PO4) equal to 3 ∶1 by the singlecrystal sapphire hemisphere. The etching microstructural characteristics under typical mask shapes were compared and analyzed, and the relationship between the etch rates of crystal planes and forming planes of microstructures was explored. The results show that the overall etching rate distribution of sapphire presents typical trigonal symmetry and multiextreme pattern, and the etch rates of crystal planes near equator are extremely low. Using high concentration phosphoric acid as etching buffer can significantly reduce the generation of various microbumps in the etching process and effectively improve the quality of microstructure surface processing.
		2020 Vol. 41 (5): 530-534 [Abstract] ( 45 ) [HTML 1KB] [ PDF 8279KB] ( 794 )

	535	Design and experiment of porosity control mechanism for reed bunching device with high vertical sand barrier
	Design and experiment of porosity control mechanism for reed bunching device with high vertical sand barrier[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 535-540>')" href="#">	ZHANG Jiangyu, GE Yun, ZHENG Yijiang, YU Pengfei
		To solve the problem of difficult control of the void spacing for reed highstanding barrier, the pore pushing mechanism of reed highstanding barrier bunching device was designed. For the key parts of the proposed mechanism, the design and parameter determination of push arc plate, the calculation of push cam profile by analytical method and the design and calculation of gap push rod were included. A threedimensional model of the void pushing mechanism was established, and the model was introduced into the ADAMS environment. The kinematics simulation analysis of the virtual prototype was carried out, and the motion law of the mechanism driven by the slow pushing cam was investigated. A void distance control pushing rod mechanism was developed for the void control test. The test results show that the average void rate is 50.13%, which verifies the established model. The correctness and rationality of the design can provide a reference for the research and development of automatic reed high vertical sand barrier bundler in the future.
		2020 Vol. 41 (5): 535-540 [Abstract] ( 42 ) [HTML 1KB] [ PDF 6189KB] ( 481 )

	541	Design and experiment of separation equipment of rindpithleaf for corn stalk
	Design and experiment of separation equipment of rindpithleaf for corn stalk[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 541-550>')" href="#">	ZHANG Hongjian, WANG Defu, KONG Fanting, LIU Zhaoxian, HUANG Huinan
		To solve the problems of poor adaptability and low productivity and separation rate of the existing separation equipment of rindpithleaf for corn stalk, a separation equipment of rindpithleaf for corn stalk was designed with simple structure and high reliability. The equipment was mainly composed of leafstripping, stalkspreading and pithstripping device. Combining cartesian coordinate with polar coordinate principle， the leafstripping mechanism was designed， and the pithstripping mechanism was also designed based on cutting pithstripping and dropping principles. The main affecting factors on separation performance were taken as experimental factors, and leafstripping rate and pith residue rate were chosen as evaluation indexes to carry out the orthogonal experiment by the experimental device. The results show that when the spring diameter ， the feed linear speed of feed roller and the rotation speed of leafstripping roller are respective 1.4 mm，1 m·s-1 and 700 r·min-1, and the leafstripping rate can be controlled in the optimal range. Under the conditions with the number of pithstripping knives of 6, the gap between top plate and pithstripping knives of 1.8 mm, the rotating speed of pithstripping roller of 780 r·min-1 and the installation angle of pithstripping knives of 45°, the pith residue rate can be controlled in the optimal range. According to the above optimization parameters, the experimental results of the designed separation equipment show that the leafstripping rate is 97.5%, and the pith residue rate is 2.8%. The rind is intact with uniform pith particles, which meets the operating requirements of the separation of rindpithleaf of corn stalk.
		2020 Vol. 41 (5): 541-550 [Abstract] ( 45 ) [HTML 1KB] [ PDF 2738KB] ( 540 )

	551	Design and experiment of combined seed metering device
		LI Juanjuan, ZHANG Heping, HU Bin, BI Xinsheng, ZHANG Tongyuhao, LI Shuzhuo
		To solve the problem that the traditional mechanical seed metering device was difficult to replace during working, the structural parameters of the key components of the seed metering device were determined by theoretical analysis method to design a combined seed metering device. EDEM discrete element software was used to complete the universal orthogonal rotation combination test with the rotation speed of seed metering, the diameter of hole and the depth of hole as influence factors. The design data were analyzed by Design Expert 8.0.6 software, and the influence factors were obtained. The regression model among the performance indicators was ranked, and the target parameters were optimized based on the regression model to determine the optimal combination parameters. The results show that when the rotation speed of the seeding wheel is 40.38 r·min-1 with the hole diameter of 9.94 mm and the hole depth of 8.47 mm, the predicted yield is 96.24%. Based on the results, the bench test can be carried out and can verify the simulation results.
		2020 Vol. 41 (5): 551-556 [Abstract] ( 45 ) [HTML 1KB] [ PDF 8288KB] ( 605 )

	557	Method for estimation of vehicle queues length based on probability theory
	Method for estimation of vehicle queues length based on probability theory[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 557-561>')" href="#">	LI Jin, WANG Peng, LI Bolin, WEI Xiaozhong
		In order to analyze the intersection traffic conditions better and provide data for traffic flow detection and traffic congestion identification, the vehicle queue length of intersection was investigated based on the probability theory.The number of vehicles into/out the intersection and time were used to fit vehicletime curve. The correction of starting time was established for revising the time from the vehicle driving into the intersection to the vehicle leaving the intersection.The speeddistance model was established to deduce the correction of starting time by analyzing the traffic flow status, and the calculation method of the vehicle queue length was deduced by the differential and integral calculus method.The Hongqi street and Huxi road intersection traffic data in Changchun city were taken as example, and the experiment was carried out to verify the method. The results show that the method can conveniently collect data with simple facility layout, which makes the method easier for largescale application.The relative errors of E of 14 time points in 16 time points are less than 6% in the queue length, which illuminates that the calculation method is accurate enough for the measurement of vehicle queue length of intersection.
		2020 Vol. 41 (5): 557-561 [Abstract] ( 44 ) [HTML 1KB] [ PDF 1810KB] ( 941 )

	562	Method for extracting fault feature information of multiaxis rotor system based on VMD-AR spectrum
	Method for extracting fault feature information of multiaxis rotor system based on VMD-AR spectrum [J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 562-568>')" href="#">	WU Fei， CHENG Ke， DING Jun， LIU Suhang
		To solve the problem of modal aliasing in the nearfrequency part of the existing decomposition method and improve the accuracy of the timevarying parameter model for direct diagnosis of the fault signal, the typical fault signal analysis method of the multiaxis rotor system was investigated. A method for analyzing fault characteristic signals was proposed based on the combination of variational mode decomposition (VMD) and AR spectrum. The number of decomposition modes k in VMD was selected by the instantaneous frequency mean method. After the VMD decomposition, the inherent modal functions (IMFs) were generated. The AR spectrum was used to extract the features of IMFs, and the characteristic frequency bands corresponding to the typical failure modes were analyzed. The results show that the problem of selecting the decomposition mode number k can be solved by the fault feature extraction method based on VMDAR spectrum, and the k value can be avoided in the empirical selection. The modal aliasing of the nearfrequency part of the signal decomposition can be suppressed by VMD. The windowing effect of Hilbert separation is overcome by the AR model, which has strong resolution in frequency band division. The proposed method can effectively extract fault features and provide feature information for the hybrid kernel support vector machine algorithm of the improved particle swarm optimization algorithm.
		2020 Vol. 41 (5): 562-568 [Abstract] ( 30 ) [HTML 1KB] [ PDF 3522KB] ( 481 )

	569	Gasphase parasitic reaction pathways in AlN-MOCVD growth
		ZHONG Tingting， ZUO Ran
		The density functional theory (DFT) of quantum chemistry was used to study the gasphase parasitic reactions in AlNMOCVD growth for UV optoeletronic devices. The reaction pathways of three oligomers of ［DMAlNH2］2, ［MMAlNH］2 and ［MMAlNH］3 with NH3 were investigated, which were related with gaseous nanoparticle generation. By comparing the Gibbs free energy difference of ΔG and transition state barrier of ΔG*, the direction and probability of the related reactions were determined. The results show that there are two competition pathways for ［DMAlNH2］2. When T is less than 749 K， the reaction path is dominated by bimolecular reaction with ［Al(NH2)3］2 as the product. When T is more than 749 K, it is dominated by intramolecular reaction with ［MMAlNH］2 as the product, since the reactions always take the path with lower energy barrier. The other two oligomers of ［MMAlNH］2 and ［MMAlNH］3 both tend to the bimolecular reaction with NH3 to form the more stable gas products of ［AlNHNH2］2 and ［AlNHNH2］3 with CH4 elimination. The ［Al(NH2)3］2, ［AlNHNH2］2 and ［AlNHNH2］3 are probably the end gas precursors for surface reactions and for nanoparticle generation in AlNMOCVD process.
		2020 Vol. 41 (5): 569-574 [Abstract] ( 58 ) [HTML 1KB] [ PDF 4127KB] ( 475 )

	575	A novel NIR ratiometric fluorescent probe for hydrogen sulfide detection
	A novel NIR ratiometric fluorescent probe for hydrogen sulfide detection[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 575-579>')" href="#">	HAN Zhixiang, GU Yuxing， WANG Yang, DONG Lianghuan, JIANG Shu
		A nearinfrared region （NIR） ratiometric fluorescent probe 1 was constructed based on flavylium derivative to monitor and image exogenous and endogenous H2S in living cells. The results show that when H2S is added, the nucleophilic addition of H2S to the benzopyran portion of the probe molecule 1 can destroy the conjugate system, resulting in the reduction of near infrared (NIR) emission at 720 nm. The green fluorescence at 503 nm is significantly enhanced because the adduct contains a complete semirigid coumarin fluorescence group. Due to the different emission wavelength of probe 1 with that of semirigid coumarin, there are two completely separated emission peaks before and after adding H2S, and the effective ratio detection of H2S is realized. In the presence of 4.0 μmol·L-1 of H2S, a 19.2fold fluorescence intensity enhancement is occurred. Probe 1 shows a good linearity with H2S when it ranges from 0.1 mol·L-1 to 4.0 μmol·L-1 with R2 of 0.993 9, and the detection limit is 57.8 nmol·L-1. The probe 1 can be sensitive to H2S with response time of only 110 seconds and good selectivity. The probe 1 can be successfully applied to fluorescence imaging of endogenous and exogenous H2S in living cells.
		2020 Vol. 41 (5): 575-579 [Abstract] ( 40 ) [HTML 1KB] [ PDF 2128KB] ( 481 )

	580	Soft sensor modeling of wastewater treatment processes using KPLS-GPR
		LIU Hongbin, YANG Chong
		The integrating method of kernel partial least squares with Gaussian process regression (KPLSGPR) was used to predict the effluent chemical oxygen demand (COD) and effluent suspended solids (SS) in papermaking wastewater treatment processes (WWTP). The latent variables from KPLS were used to handle the high dimensionality and the complex collinearity problem of WWTP data. The GPR model was used to develop the regression between the latent variables and the output variables. Based on the WWTP data set from a paper mill, the simulation experiment was conducted. The soft sensors of artificial neural network (ANN), PLSANN and KPLSANN were proposed for the comparison. The results show that the latent variables of KPLS can be used to improve the prediction results of conventional models obviously, and KPLSGPR achieves the best prediction performance. For the prediction of effluent COD and effluent SS, the values of determination coefficient for KPLSGPR are 0.575 and 0.610, respectively, which are respectively improved by 36.90% and 43.87% in comparison with those of the conventional counterparts.
		2020 Vol. 41 (5): 580-587 [Abstract] ( 41 ) [HTML 1KB] [ PDF 1847KB] ( 488 )

	588	Review on preparation and properties of phase change concrete
		ZHOU Jianting, NIE Zhixin, GUO Zengwei, YANG Juan, ZHENG Zhong
		The classification and characteristics of phase change materials(PCMs), the shape setting and packaging technology of PCMs, and the mix proportion design and performance of phase change concrete were reviewed. The thermophysical parameters, application status and multicomponent composite phase change system of solidliquid PCMs were studied.The shape setting and packaging technology of PCMs was summarized, and the porous matrix adsorption method was mainly discussed. The design principle, mechanical properties and thermal properties of phase change concrete were compared and analyzed, and the research direction of phase change concrete was prospected. The results show that paraffin wax, fatty acid and alcohol are more suitable for the application of engineering construction environment.PCMs are not suitable for direct mixing with concrete aggregates,and porous matrix materials are usually used to absorb liquid PCMs to prepare phase change aggregates.The thermal conductivity of phase change concrete is evidently affected by the amount of phase change aggregate.With the increasing of phase change aggregate content, the specific heat capacity of phase change concrete is often increased, while the strength of phase change concrete is decreased.
		2020 Vol. 41 (5): 588-595 [Abstract] ( 24 ) [HTML 1KB] [ PDF 1473KB] ( 619 )

	596	Influence of carbon nanofiber on temperature resistance effect of carbon fiber reinforced polymer
		LIU Ronggui, WENG Yu, LI Shiquan, XIE Guihua, CAI Junhua, SUN Yue
		To explore the effect of carbon nanofiber (CNF) doping amount on the temperature resistance effect of carbon fiber reinforced polymer(CFRP), the CNF conductive particles were uniformly dispersed in the epoxy resin matrix, and the CFRP components with different doping amounts were fabricated by the brush molding process. A cyclic temperature test was conducted, and the resistances of the CFRP component were recorded. The results show that all components have positive temperature coefficient (PTC) effect and have excellent linear relationship between temperature and resistivity during the heating process. When the amount of CNF is 0.5%, it is close to the percolation threshold of material, and the temperature sensitivity of component is the strongest.Under the cyclic temperature loading, the temperature curves change in the same trend, but it presents significant "hysteresis loop" phenomenon.As the number of cycles of temperature loading is increased, the temperature sensitivity of the component is decreased, while the repeatability becomes better.
		2020 Vol. 41 (5): 596-600 [Abstract] ( 44 ) [HTML 1KB] [ PDF 4336KB] ( 416 )

	601	Mechanical response of asphalt pavement based on vehicleroad coupling vibration
	Mechanical response of asphalt pavement based on vehicleroad coupling vibration[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 601-608>')" href="#">	YAN Zhanyou, ZHAO Xiaolin, CHEN Enli, ZHAO Yong, ZHAO Guoye
		A threedimensional 1/4 vehicle model with two degrees of freedom and a viscoelastic asphalt pavement model were established by ABAQUS. The rubber tires and the nonlinear contact between tire and pavement were considered in the models.The central difference method was used to solve the problems, and the results were compared with the references. The results show that the models are feasible. The maximum vertical compressive stress of the upper layer under static force is 0.402 MPa, and the dynamic load of 1/4 vehicle is 0.563 MPa, which is 40.05% higher than that under static force. The maximum vertical displacements of the upper layers of grade A, B and C pavement are 0.589, 0.698 and 0.941 mm, respectively, and the displacement of grade C is 59.76% larger than that of grade A. The maximum vertical compressive stresses of the upper layers are 0.497, 0.702 and 0.739 MPa, respectively, and the maximum vertical compressive stress of grade C is 48.69% larger than that of grade A. The maximum vertical and transverse compressive strains are appeared in the middle layer.The maximum vertical tension strain, longitudinal compressive strain and transverse tension strain are appeared in the lower layer,and the maximum longitudinal tension strain is appeared in the soil foundation. The greater the vehicle speed is, the smaller the pavement response is. The greater the axle weight is, the greater the pavement response is.
		2020 Vol. 41 (5): 601-608 [Abstract] ( 36 ) [HTML 1KB] [ PDF 2821KB] ( 532 )

	609	Dynamic longgauge strain solution method for highway bridge under vehiclebridge coupling
	Dynamic longgauge strain solution method for highway bridge under vehiclebridge coupling[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 609-614>')" href="#">	WU Bitao, ZOU Youquan, CHEN Mengcheng, WU Gang
		To solve the problem that the vehicle bridge coupling method could not directly solve the longgauge strain of bridge, the solution method for the dynamic longgauge strain time history of bridges was investigated under the moving vehicle loads. Considering the influence of road surface irregularity, the dynamic solution equation of the longgauge strain of bridge in the vehicle bridge coupling system is solved by MATLAB software. The dynamic longgauge strains in the middle of bridge span at different speeds were solved and compared with the traditional point strain time history. The results show that the longgauge strain and the point strain time history are generally close. When the vehicle speed exceeds 20 m·s-1, the difference between them is slight. Under different vehicle speed conditions, the long gauge dynamic strain time history and the point strain time history have the same change regularity with vehicle speed. The variation regularity of longgauge strain with vehicle speed and the accuracy of theoretical test are verified.
		2020 Vol. 41 (5): 609-614 [Abstract] ( 42 ) [HTML 1KB] [ PDF 2682KB] ( 520 )

	615	Experiment of swelling properties of improved typical expansive soil in Yunnan by industrial alkali residue
	Experiment of swelling properties of improved typical expansive soil in Yunnan by industrial alkali residue[J]. Journal of JIangsu University(Natural Science Eidtion), 2020,41(5): 615-620>')" href="#">	SUN Xiaohai, XIE Jianbin, CHEN Wei, ZHAO Yiji, JIANG Sheng, LIU Daoyan
		The laboratory test was used to study the typical expansive soil in Mengzi area of Yunnan Province improved by industrial alkali residue. The effects of cement amount, industrial alkali residue amount and cementindustry alkali residue amount on the expansion characteristics of expansive soil were investigated. The test results show that industrial alkali residue, cement and cementindustry alkali residue can all reduce the free expansion rate of pure expansive soil. The minimum expansion rate of industrial alkali residue modified soil is 0.77 times of that of cement. When the modified expansive soil admixture ratio of industrial alkali residue and cement are respectively more than 30% and 6%, the displacement curve of expansion and shrinkage is not change. When the optimum mixing ratios of industrial alkali residue and cement are respective 30% and 6%, the minimum expansion force of industrial alkali residue modified soil is only 0.33 times of that of cement modified soil and 0.05 times of that of pure expansive soil.The optimum ratio of industrial alkali residue admixture to expansive soil cohesion and internal friction angle is from 30% to 40%.
		2020 Vol. 41 (5): 615-620 [Abstract] ( 40 ) [HTML 1KB] [ PDF 1611KB] ( 438 )

江苏大学学报（自然科学版）

　

News

　

·	关于近期网络不稳定情况的说明

·	Our journal has be included in JSTChina Database

·	Our journal has be selected for the 2015-2016 China Science Citation Database (CSCD)

　　　　　　　　　　More

　

Links

　

·	Chinese Library Classification Number

·	Society of China University Journals

·	China National Knowledge Infrastructure

·	Chinese Sciencepaper Online

·	Transactions of the Chinese Society for Agricultural Machinery

·	Journal of Southeast University：Natural Science Edition

　　　　　　　　　　More

Copyright © 2011 Journal of Jiangsu University(Natural Science Eidtion)
Support by Beijing Magtech Co.Ltd E-mail：support@magtech.com.cn