Pavement Performance of Low Dosage Cement Stabilized Gravel Powder Mixed with Aggregates

2013 ◽  
Vol 668 ◽  
pp. 48-52 ◽  
Author(s):  
Chuan Yi Zhuang ◽  
Ya Li Ye
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Mix Design ◽  
Pavement Performance ◽  
Economic Factors ◽  
Engineering Project ◽  
Design Strength ◽  
Test Analysis ◽  
Mixed Aggregates ◽  
Low Dosage

On the basis of test analysis, mix design of cement stabilized gravel powder, cement stabilized gravel powder mixed with 20% aggregates and cement stabilized gravel powder mixed with 40% aggregates were compared, their unconfined compressive strength were tested, and the mixed aggregates ratio and mix design were ultimately determined. The experimental results show that mixing a certain amount of aggregate can reduce cement dose and meet the design strength. Engineering project cost by mixing with a certain amount of aggregate was little higher than that of cement stabilized gravel powder. Comprehensively considering technical and economic factors, the recommended amount of aggregates mixed with 30% and cement dose of 2%.

Mix Design for Flowable Fill

1997 ◽  
Vol 1589 (1) ◽  
pp. 26-28 ◽  
Author(s):  
S. T. Bhat ◽  
C. W. Lovell
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Ultimate Strength ◽  
Coal Combustion ◽  
Unconfined Compressive Strength ◽  
Mix Design ◽  
Target Strength ◽  
Fresh Material ◽  
Flowable Fill ◽  
Strength Material

The grout-like material called flowable fill has experienced new popularity, particularly the controlled low-strength material variety, which is easily excavated. The properties ordinarily desired of the mix are: (a) flow under gravity; (b) hardening for early walkability and cover; and (c) ultimate strength low enough to allow ready excavation. Flowability of fresh material is evaluated in a simple spread test. Hardening is measured by a mortar penetrometer, and these values are correlated with unconfined compressive strength. It is desirable to keep the ultimate strength to less than 1 035 kPa (150 lbf/in.2); somewhat less target strength is selected for the 28-day value. Mix design is empirical, but the time and expense required may be reduced by following a rational and logical procedure, which is described. The materials emphasized in this paper are Class F coal combustion fly ash and waste sands from greensand ferrous castings.

Selection of Strength Standard of CTB in High-Class Highways

2011 ◽  
Vol 243-249 ◽  
pp. 4261-4264
Author(s):  
Yin Fei Du ◽  
Xin Yu
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Bottom Layer ◽  
Practical Significance ◽  
Design Strength ◽  
Cleavage Strength ◽  
Current Design ◽  
Truck Load ◽  
The Relationship ◽  
Selection Of

A reasonable design strength standard is of great practical significance for reducing pavement diseases. First, the bottom layer tensile stress of the typical pavement structure in the operating period is calculated using computer program BISAR while the overload、the interface link status and construction variability are all considered. And then the bottom layer tensile stresses of the upper and lower base are checked under truck load during construction. According to the relationship between cleavage strength (90d) and unconfined compressive strength (7d), it is deemed that the appropriate design strength standard should be 2.1MPa~3.5MPa. Finally, combined with the results of the unconfined compressive strength of core samples in the field it is proved that the current design standard is a little high.

scholarly journals Calculating Compressive and Flexural Strength of Concrete by Computer Program

2020 ◽  
pp. 33-40
Keyword(s):  
Quality Control ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Data Storage ◽  
Engineering Project ◽  
Design Strength ◽  
Storage And Retrieval ◽  
Code Of Practice ◽  
Standard Code ◽  
Compressive Strength Of Concrete

The testing of concrete for its desired strength after casting is one of prime activities quality control of civil engineering project executions. The concrete is chiefly tested for its compressive strength and then the results are compared or checked with the desired design strength. In the era of computers used in every spectrum of life, the testing of materials and its results calculations also needs to be programed for calculations, validations and data storage. The cell based software do provide ease of calculations but storage and retrieval of data is difficult in those software. The current study is an effort to develop a program the calculations of compressive strength of concrete and flexural strength of the concrete as per Indian Standard Code of Practice. The standalone customized software used in calculations gives accurate and consistent results. Also, the validations programed with logics avoid hazy manual interpretations of the regulatory provisions and gives accurate results.

Rapid determination of soil unconfined compressive strength using reflectance spectroscopy

2021 ◽  
Vol 80 (5) ◽  
pp. 3923-3938
Author(s):  
Fatemeh Mousavi ◽  
Ehsan Abdi ◽  
Parviz Fatehi ◽  
Abbas Ghalandarzadeh ◽  
Hossein Ali Bahrami ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Rapid Determination ◽  
Reflectance Spectroscopy

scholarly journals Compression and Strain Predictive Models in Non-Structural Recycled Concretes Made from Construction and Demolition Wastes

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3177
Author(s):  
Evelio Teijón-López-Zuazo ◽  
Jorge López-Rebollo ◽  
Luis Javier Sánchez-Aparicio ◽  
Roberto Garcia-Martín ◽  
Diego Gonzalez-Aguilera
Keyword(s):  
Compressive Strength ◽  
Predictive Models ◽  
Unconfined Compressive Strength ◽  
Image Correlation ◽  
Peak Strain ◽  
Compression Tests ◽  
Maximum Peak ◽  
3D Digital Image Correlation ◽  
Granulometric Analysis ◽  
Physical And Chemical

This work aims to investigate different predictive models for estimating the unconfined compressive strength and the maximum peak strain of non-structural recycled concretes made up by ceramic and concrete wastes. The extensive experimental campaign carried out during this research includes granulometric analysis, physical and chemical analysis, and compression tests along with the use of the 3D digital image correlation as a method to estimate the maximum peak strain. The results obtained show that it is possible to accurately estimate the unconfined compressive strength for both types of concretes, as well as the maximum peak strain of concretes made up by ceramic waste. The peak strain for mixtures with concrete waste shows lower correlation values.

scholarly journals Characterization and Comparison Research on Composite of Alluvial Clayey Soil Modified with Fine Aggregates of Construction Waste and Fly Ash

2021 ◽  
Vol 28 (1) ◽  
pp. 83-95
Author(s):  
Qu Jili ◽  
Wang Junfeng ◽  
Batugin Andrian ◽  
Zhu Hao
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Unconfined Compressive Strength ◽  
Clayey Soil ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Construction Waste ◽  
Comparison Research ◽  
Fine Aggregates ◽  
Optimum Water Content

Abstract Fine aggregates of construction waste and fly ash were selected as additives to modify the characteristics of Shanghai clayey soil as a composite. The laboratory tests on consistency index, maximum dry density, and unconfined compressive strength were carried out mainly for the purpose of comparing the modifying effect on the composite from fine aggregates of construction waste with that from fly ash. It is mainly concluded from test results that the liquid and plastic limit of the composites increase with the content of two additives. But their maximum dry density all decreases with the additive content. However, fine aggregates of construction waste can increase the optimum water content of the composites, while fly ash on the contrary. Finally, although the two additive all can increase the unconfined compressive strength of composites, fly ash has better effect. The current conclusions are also compared with previous studies, which indicates that the current research results are not completely the same as those from other researchers.

scholarly journals Experimental Study on Improvement of Marine Soft Soil with Alkali Residue

2018 ◽  
Vol 53 ◽  
pp. 04021
Author(s):  
SHAO Yong ◽  
LIU Xiao-li ◽  
ZHU Jin-jun
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Void Ratio ◽  
Soft Soil ◽  
Compressive Modulus ◽  
Engineering Properties ◽  
Test Results ◽  
Use Of Resources ◽  
One Year

Industrial alkali slag is the discharge waste in the process of alkali production. About one million tons of alkali slag is discharged in China in one year. It is a burden on the environment, whether it is directly stacked or discharged into the sea. If we can realize the use of resources, it is a multi-pronged move, so alkali slag is used to improve solidified marine soft soil in this paper. The test results show that the alkali residue can effectively improve the engineering properties of marine soft soil. Among them, the unconfined compressive strength and compressive modulus are increased by about 10 times, and the void ratio and plasticity index can all reach the level of general clay. It shows that alkali slag has the potential to improve marine soft soil and can be popularized in engineering.

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