Mix Design of Cement-Stabilized Recycled Aggregate Base Course Material

2010 ◽  
Author(s):  
Yijin Li ◽  
Xinpeng Sun ◽  
Jian Yin
Keyword(s):  
Recycled Aggregate ◽  
Mix Design ◽  
Base Course Material ◽  
Course Material ◽  
Base Course ◽  
Aggregate Base

Resilient Properties and Fatigue Damage in Stabilized Recycled Aggregate Base Course Material

1998 ◽  
Vol 1611 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Khaled Sobhan ◽  
Raymond J. Krizek
Keyword(s):  
Elastic Modulus ◽  
Fly Ash ◽  
Fatigue Damage ◽  
Damage Accumulation ◽  
Resilient Modulus ◽  
Recycled Aggregate ◽  
Fiber Reinforced ◽  
Base Course Material ◽  
Course Material ◽  
Base Course

A stabilized fiber-reinforced base course material composed largely of recycled concrete aggregate with small amounts of portland cement and fly ash was subjected to repeated flexural loading to evaluate its resilient properties and progressive accumulation of fatigue damage. Cyclic load-deformation data were recorded continuously during the entire fatigue life until fracture to determine ( a) the magnitude and variation of cumulative plastic strain and dynamic elastic modulus as a function of the number of loading cycles, ( b) a range for the resilient modulus, and ( c) the effect of fiber inclusions on the dynamic material properties and rate of damage accumulation. The extent of fatigue damage was calculated as a fatigue damage index, which is based on the cumulative energy dissipated (absorbed) during cyclic loading. All beam specimens used in this experimental program contained (by weight) 4 percent cement, 4 percent fly ash, and 92 percent recycled aggregate; the fiber-reinforced specimens contained an additional 4 percent (by weight) hooked-end steel fibers. Results show that the resilient modulus in flexure varies between about 2.75 GPa (400,000 lbf/in2.) and 10.4 GPa (1.5 million lbf/in.2) and the degradation of the dynamic elastic modulus does not exceed 25 percent of the initial modulus. Miner’s Rule of linear summation of damage is applicable to unreinforced material but not to fiber-reinforced material. In general, a modest amount of reinforcing fibers was very effective in retarding the rate of fatigue damage accumulation in this lean cementitious composite.

scholarly journals Structural Materials. The Investigation about the Application of the Recycled Aggregate to the Base Course Material.

2001 ◽  
Vol 50 (8) ◽  
pp. 843-850
Author(s):  
Hiromichi MATSUSHITA ◽  
Hiroaki TSURUTA ◽  
Atsushi KUBONO ◽  
Satoshi FUJIMOTO ◽  
Seiichi TANIMOTO
Keyword(s):  
Structural Materials ◽  
Recycled Aggregate ◽  
Base Course Material ◽  
Course Material ◽  
Base Course

Research on Performance of Cement Stabilized Skeleton-Dense Structure Aggregate Base Course Material

2011 ◽  
Vol 194-196 ◽  
pp. 1089-1094
Author(s):  
Li Qun Hu ◽  
Ai Min Sha
Keyword(s):  
Cement Content ◽  
Thermal Shrinkage ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Dense Structure ◽  
Base Course Material ◽  
Course Material ◽  
Base Course ◽  
Aggregate Base ◽  
Shrinkage Coefficient

Laboratory tests were conducted to evaluate the performance of cement stabilized “skeleton-dense structure” aggregate and conventional “suspended-dense structure” aggregate. In this study, both of the aggregates above were stabilized by cement with different cement content (2%, 3%, 4%, 5% and 6%). Performances of the prepared specimens were studied in terms of compaction property, 7 day unconfined compressive strength (UCS), thermal shrinkage coefficient and 30 min erosion quantity. Results indicated that the maximum dry density of cement stabilized “skeleton-dense structure” aggregate is bigger than that of cement stabilized “suspended-dense structure” aggregate slightly. On the contrary, the optimum moisture content of the former is slightly smaller than that of the latter one. Along with the increase of cement content, the 7 day UCS and thermal shrinkage coefficient of cement stabilized two aggregates were all increase, and 30 min erosion quantity of cement stabilized two aggregates were all decrease. At the same cement content level, the 7 day UCS of cement stabilized “skeleton-dense structure” aggregate is greater than that of cement stabilized “suspended-dense structure” aggregate, and the thermal shrinkage coefficient and erosion quantity in 30 min of the former is smaller than that of the latter.

scholarly journals EFFECTS OF FREEZE-THAWING ON BEARING CAPACITY OF GRANULAR BASE COURSE MATERIAL

2012 ◽  
Vol 68 (3) ◽  
pp. I_115-I_122
Author(s):  
Shinichiro KAWABATA ◽  
Tatsuya ISHIKAWA ◽  
Takumi MURAYAMA ◽  
Shuichi KAMEYAMA
Keyword(s):  
Bearing Capacity ◽  
Base Course Material ◽  
Course Material ◽  
Base Course ◽  
Granular Base

The Research on the Application of the Steel Slag Produced by the Converters of Jigang Group Co. Ltd on Base Course

2012 ◽  
Vol 178-181 ◽  
pp. 1699-1705
Author(s):  
Fa Liang Lu ◽  
Jin Li
Keyword(s):  
Mechanical Property ◽  
Unconfined Compressive Strength ◽  
Steel Slag ◽  
Coal Ash ◽  
Strength Test ◽  
Water Stability ◽  
Compressive Strength Test ◽  
Base Course Material ◽  
Course Material ◽  
Base Course

To test and inspect the chemical compositions and mechanical properties of the steel slag produced by the converters of Jigang Group co. ltd, and study the feasibility of using the steel slag as base course material. Prepare cement stabilized steel slag specimens with different contents of cement mixed for the unconfined compressive strength test. Determine through test its strength after 7 days and 28 days and its water stability after 7 days’ soaking. Prepare in the same method of two different kinds of cement and coal ash stabilized specimens with different contents of coal ash mixed for the unconfined compressive strength test, to test its strength and water stability. The comparison on mechanical property with cement stabilized macadam indicates that the cement stabilized steel slag and cement with coal ash stabilized steel slag both have favorable mechanical property and water stability and the steel slag produced by the converters of Jigang Group co. ltd can be popularized for use as base course material.

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