scholarly journals Deformation characteristics of slag base-course material containing fly ash pellet.

2000 ◽  
pp. 269-275
Author(s):  
Nobuyuki YOSHIDA ◽  
Masaru NISHI
Keyword(s):  
Fly Ash ◽  
Deformation Characteristics ◽  
Base Course Material ◽  
Course Material ◽  
Base Course

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.

Study on Solidification Mechanism of Chloride Salt in Base Course Material of Cement-Fly-ash-Flushed-by-Seawater

2011 ◽  
Vol 236-238 ◽  
pp. 755-761
Author(s):  
Long Sheng Bao ◽  
Xiao Fang Zhang ◽  
Ling Yu ◽  
Guang Shan Zhu
Keyword(s):  
Fly Ash ◽  
Chloride Ions ◽  
Chloride Salt ◽  
Analysis Method ◽  
X Ray Diffraction ◽  
Base Course Material ◽  
Course Material ◽  
Base Course ◽  
Solidification Mechanism ◽  
Unconfined Strength

Through analyzing the influence of different slat content on the microstructure of cement and fly-ash-flushed-by-seawater binder, the solidification mechanism of salt added cement and fly-ash-flushed-by-seawater binder is investigated. The Scanning Electron Microscope test, X-Ray diffraction and theoretical analysis method are adopted to study the performance and the microstructure of cement and fly-ash-flushed-by-seawater, and to analyze the solidification mechanism of chloride in the mixture. When content of the chloride ions is added to the cement and fly-ash-flushed-by-seawater binder, a new kind of crystal-Friedel can be generated in the age of 7d and 28d. According to the unconfined strength test on the specimens which contain 0.5% chloride ions, the strength is high in 7d, highest in 28d. The chloride ions of the fly-ash-flushed-by-seawater can be solidified in the cement and fly-ash-flushed-by-seawater binder, which can increase the strength of the binder.

Stabilization of fly ash and lime sludge composites: Assessment of its performance as base course material

2017 ◽  
Vol 17 (3) ◽  
pp. 475-485 ◽  
Author(s):  
Vaishali Sahu ◽  
Amit Srivastava ◽  
Anil Kumar Misra ◽  
Anil Kumar Sharma
Keyword(s):  
Fly Ash ◽  
Base Course Material ◽  
Course Material ◽  
Lime Sludge ◽  
Base Course

scholarly journals Experimental Water Quality Analysis from the Use of High Sulfuric Fly Ash as Base Course Material for Road Building

2019 ◽  
Vol 9 (5) ◽  
pp. 4627-4630
Author(s):  
N. Viet Duc
Keyword(s):  
Water Quality ◽  
Fly Ash ◽  
Human Life ◽  
Quality Analysis ◽  
Arsenic Content ◽  
Road Building ◽  
Chemical Admixture ◽  
Base Course Material ◽  
Course Material ◽  
Base Course

Water quality directly influences human life. Drinking water contamination can result in severe health problems. This paper deals with the analysis of water specimens from submergence of material containing high sulfuric fly ash as base course material for road building. The specimens were obtained from real road testing. Results showed that for the material that used fly ash and chemical admixture, water quality was suitable for drinking in accordance with the standard parameters prescribed by the Vietnam Ministry of Health, while for the material that used the same fly ash without chemical admixture, the total arsenic content was eight times higher than that of the former. Thus, if one desires to utilize fly ash with high sulfur as base course material for road building, it needs to be used in combination with appropriate chemical admixture, so that it would not affect ground water quality.

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
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