Experimental Research on the Mechanical Properties of Compacted Cement Soil in Collapsible Loess Area and Engineering Application

2011 ◽  
Vol 250-253 ◽  
pp. 421-424
Author(s):  
Ying Xia Yu ◽  
Yu Feng Jiao ◽  
Bin Liang ◽  
Wei Zhang
Keyword(s):  
Cement Content ◽  
Engineering Application ◽  
Curing Time ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Mixture Ratio ◽  
Loess Area ◽  
Optimum Water Content ◽  
Rational Construction ◽  
Cement Soil

Based on the compaction test and unconfined compression test of cement soil, the optimum water content is ascertained. The relationship is studied about cement content, curing time and unconfined compression strengths, ultimate strain of compacted cement soil in this paper. The results indicate that the unconfined compression strengths increase in linear with the increase of curing time and cement content on the whole, and the ultimate strains decrease with the increase of cement content and curing time. The results provide theoretical basis for rational construction mixture ratio and parameter which have been successfully used to a project and achieved good economic benefit.

Laboratory Experimental Research on Mix Ratio Test of Cement Soil

2013 ◽  
Vol 438-439 ◽  
pp. 197-201
Author(s):  
Xian Hua Yao ◽  
Peng Li ◽  
Jun Feng Guan
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Cement Content ◽  
Ratio Test ◽  
Curing Time ◽  
Curing Conditions ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Cement Soil

Based on the generalization and analysis of laboratory experimental results on mix ratio, the effects of various factors such as cement content, water-cement ratio, curing time, curing conditions and types of cement on the mechanical properties of unconfined compressive strength of cement soil are presented. Results show that the unconfined compressive strength of cement soil increases with the growing curing time, and it is greatly affected by the cement content, water-cement ratio, cement types and curing time, while the effect of curing conditions is weak with a cement content of more than 10%. Moreover, the stress-strain of the cement soil responds with the cement content and curing time, increasing curing time and cement content makes the cement soil to be harder and brittle, and leads to a larger Young's modulus.

Experimental Study on the Additive Effects of Cyclic Freezing-Thawing on the Durability of Cement Soil

2014 ◽  
Vol 507 ◽  
pp. 363-367 ◽  
Author(s):  
Yong Qin Wen ◽  
Chao Cui
Keyword(s):  
Mechanical Performance ◽  
Cement Content ◽  
Cement Composite ◽  
Strength Loss ◽  
Unconfined Compression ◽  
Freezing And Thawing ◽  
Composite Cement ◽  
Before And After ◽  
Cement Soil ◽  
Compression Resistance

With pumice as the additive agent used in cement composite soil . In order to test the mechanical performance of the composite cement soil, the unconfined compression resistance and freezing and thawing cycle test were done in the lab with different additive quantity(2%,4%,6%,8%,10%), different cement content(4%,8%,12%,16%,20%), different number of freezing and thawing(5,10,15,20,25), The results show that the strength of the composite cement soil are significantly increase with increasing cement content, before and after freezing-thawing the strength loss and mass loss are increase with increasing freezing-thawing number and cement content.

Experimental Study on the Mechanical Performance of Pumice Powder Cement Soil

2014 ◽  
Vol 507 ◽  
pp. 383-387
Author(s):  
Yong Qin Wen ◽  
Xiang Dong Shen ◽  
Chao Cui
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Cement Content ◽  
Soft Soil ◽  
Cement Composite ◽  
Unconfined Compression ◽  
Optimum Amount ◽  
Composite Cement ◽  
Cement Soil ◽  
Compression Resistance

With pumice as the additive agent used in cement composite soil . In order to test the mechanical performance of the composite cement soil, the unconfined compression resistance and triaxial test were done in the lab with different additive quantity (25%,50%), different cement content (8%,12%,16%,20%), The results show that the strength of the composite cement soil are significantly increase with increasing cement content , there is an optimum amount 16%.The pumice powder may evidently improve the mechanical properties of soft soil.

scholarly journals Splitting Tensile Strength of Cement Soil Reinforced with Basalt Fibers

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3110
Author(s):  
Shengnian Wang ◽  
Fangyuan Chen ◽  
Qinpei Xue ◽  
Peng Zhang
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Cement Content ◽  
Microstructural Analysis ◽  
Basalt Fiber ◽  
Splitting Tensile Strength ◽  
Silty Clay ◽  
Curing Time ◽  
Basalt Fibers ◽  
Cement Soil

Due to low splitting tensile strength, cement soil is more likely to experience dry shrinkage and cracking in practical engineering. In this study, the mixing procedure of the cement soil reinforced with basalt fibers was investigated; the influences of cement content, curing time, basalt fiber content and length on the splitting tensile strength of the cement soil reinforced with basalt fibers were studied; and the correlation of the splitting tensile strength vs. the compressive strength of the cement soil reinforced with basalt fibers was discussed. The contribution of basalt fibers on performance improvement of the cement soil was also addressed based on the microstructural analysis and the toughening mechanism exposition. Results indicate that the best mixing method for the cement soil reinforced with basalt fibers is to mix the muddy silty clay with basalt fibers first, then with cement slurry. The increase of cement content and curing time can improve the splitting tensile strength of the cement soil effectively. The splitting tensile strength of the cement soil increases first and then decreases with the content and length of basalt fibers. The optimal content and length of basalt fibers for the cement soil are 0.4% and 12 mm, respectively. The relationship between the splitting tensile strength and the compressive strength of the cement soil reinforced with basalt fibers can be described as a linear relationship with the correlation coefficient of 0.245 and the determination coefficient of 0.990. The contribution of basalt fibers on the toughening mechanisms of cement soil shows that the fiber-matrix interaction would be the dominant effect to control the tensile strength of the soil-cement-fiber composites. The results of this study can provide a reference for the design and application of cement soil reinforced with basalt fibers in actual engineering.

An Empirical Correlation between Unconfined Compression Strength and Curing Time for Cement-Soil

2012 ◽  
Vol 268-270 ◽  
pp. 642-645 ◽  
Author(s):  
Ying Di Liao ◽  
Chao Hua Jiang ◽  
Xing Guo Feng
Keyword(s):  
Compressive Strength ◽  
Compression Strength ◽  
Unconfined Compressive Strength ◽  
Soft Soil ◽  
Empirical Correlation ◽  
Curing Time ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Cement Soil ◽  
Basic Standard

Different cement types were used to stabilize coastal soft soil. The unconfined compression strength of each cement type treated soil was tested at different curing time. The results showed that the higher strength degree cement lead to the higher unconfined compression strength with same cement addition after curing 90 days. An empirical correlation between unconfined compressive strength and curing time was presented to forecast the unconfined compression strength of cement-soil. Additionally, the 14 day and the data of unconfined compressive strength at that time were suggested to use as the basic standard time and standard strength data respectively.

Experimental Research on Damage of Rubberized Cement-Soil

2012 ◽  
Vol 256-259 ◽  
pp. 394-397
Author(s):  
Feng Chi Wang ◽  
Feng Qi Liu ◽  
Jun Sheng Ding ◽  
Zhi Pan Wang
Keyword(s):  
Stress And Strain ◽  
Threshold Values ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Damage Resistance ◽  
Rubber Powder ◽  
Damage Process ◽  
Powder Content ◽  
Strain Threshold ◽  
Cement Soil

In order to analyze rubber powder influencing on cement-soil, axial compression stress-strain curves and a series of damage relationship curves are obtained by unconfined compression test and circulating load-unload test. The damage process of rubberized cement-soil could be divided into four phases including internal tiny crack closing, cracking, crack stable extension and crack unstable extension. Rubber powder increased stress and strain threshold values of cement-soil. 10% was the best rubber powder content. Rubber powder can impede cement-soil inner tiny holes and crakes to occur and develop, so that damage resistance and deformation capability are improved.

scholarly journals Anisotropic and age-dependent elastic material behavior of the human costal cartilage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Matthias Weber ◽  
Markus Alexander Rothschild ◽  
Anja Niehoff
Keyword(s):  
Costal Cartilage ◽  
Indentation Test ◽  
Biomechanical Properties ◽  
Material Behavior ◽  
Cartilage Tissue ◽  
Elastic Behavior ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Young’S Moduli ◽  
Age Related

AbstractCompared to articular cartilage, the biomechanical properties of costal cartilage have not yet been extensively explored. The research presented addresses this problem by studying for the first time the anisotropic elastic behavior of human costal cartilage. Samples were taken from 12 male and female cadavers and unconfined compression and indentation tests were performed in mediolateral and dorsoventral direction to determine Young’s Moduli EC for compression and Ei5%, Ei10% and Eimax at 5%, 10% and maximum strain for indentation. Furthermore, the crack direction of the unconfined compression samples was determined and histological samples of the cartilage tissue were examined with the picrosirius-polarization staining method. The tests revealed mean Young’s Moduli of EC = 32.9 ± 17.9 MPa (N = 10), Ei5% = 11.1 ± 5.6 MPa (N = 12), Ei10% = 13.3 ± 6.3 MPa (N = 12) and Eimax = 14.6 ± 6.6 MPa (N = 12). We found that the Young’s Moduli in the indentation test are clearly anisotropic with significant higher results in the mediolateral direction (all P = 0.002). In addition, a dependence of the crack direction of the compressed specimens on the load orientation was observed. Those findings were supported by the orientation of the structure of the collagen fibers determined in the histological examination. Also, a significant age-related elastic behavior of human costal cartilage could be shown with the unconfined compression test (P = 0.009) and the indentation test (P = 0.004), but no sex effect could be detected. Those results are helpful in the field of autologous grafts for rhinoplastic surgery and for the refinement of material parameters in Finite Element models e.g., for accident analyses with traumatic impact on the thorax.

Influence of Curing Pressure on Unconfined Compressive Strength of Cemented Clay

2018 ◽  
Vol 928 ◽  
pp. 263-268 ◽  
Author(s):  
Anuchit Uchaipichat
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Cement Content ◽  
Soft Clay ◽  
Peak Stress ◽  
Confining Pressure ◽  
Compression Tests ◽  
Unconfined Compression ◽  
Soil Cement ◽  
Curing Pressure

The soil-cement columns are generally installed and cured in the soft clay layers under confining pressure. The strength of the soil-cement columns may be influenced by confining pressure during curing period. In this study, the main objective was to study the influence of curing pressure on unconfined compressive strength of cemented clay. A series of unconfined compression tests was performed on a cement admixed clay sample cured under pressure values of 0 kPa (atmospheric pressure), 25kPa, 50kPa and 100 kPa using a typical unconfined compression equipment. The test samples with values of cement content of 0.5, 1.0 and 2.0 percent were cured for 28 days.The stress-strain curves obtained from all tests show a peak value of stress. The unconfined compressive strength or peak stress obviously increased with increasing cement content for all curing pressure conditions. It can be observed that the strength of samples gradually increased with curing pressure for cement content of 0.5 percent. For cement contents of 1.0 and 2.0 percent, the strengths of samples cured under pressures of 25 kPa dramatically increased from the strength of samples cured without pressure (0 kPa), however, the strengths of samples for curing pressures of 25, 50 and 100 kPa were not clearly different.

Sign in / Sign up

Export Citation Format

Share Document