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Study on Strength Developing Regularity of Concrete with Proto-Machine-Made Sand
The proto-machine-made sand is a new environmental protection manufactured material, which is produced by technical improvement of stone cleaned by water firstly before crushed. It is always confined in engineering application because the content of stone powder is over the limit specified in current standard of Sand for Building. The paper introduces a series of test results of concrete in grade of C30 mixed with proto-machine-made sand. The contents of stone powder by mass of sand are 3 %, 7 % and 13 %, the cubic compressive strength were tested at ages of 3 d, 4 d, 7 d, 14 d, 28 d, 56 d, 90 d, 120 d, 150 d and 180 d. Based on the test results, the strength developing regularities of concrete affected by the content of stone powder are analyzed, the formulas are proposed for predicting the cubic compressive strength of concrete at any age. It is proved that the effect of stone-powder in proto-machine-made sand on concrete strength is virtually different from that of the crushed stone rust mixed with powdered mud in traditional machine-made sand, the limit content of stone powder lower than 5 % is not suitable for proto-machine-made sand to mix concrete in grade of C30.
Study on Strength Developing Regularity of Concrete with Proto-Machine-Made Sand
The proto-machine-made sand is a new environmental protection manufactured material, which is produced by technical improvement of stone cleaned by water firstly before crushed. It is always confined in engineering application because the content of stone powder is over the limit specified in current standard of Sand for Building. The paper introduces a series of test results of concrete in grade of C30 mixed with proto-machine-made sand. The contents of stone powder by mass of sand are 3 %, 7 % and 13 %, the cubic compressive strength were tested at ages of 3 d, 4 d, 7 d, 14 d, 28 d, 56 d, 90 d, 120 d, 150 d and 180 d. Based on the test results, the strength developing regularities of concrete affected by the content of stone powder are analyzed, the formulas are proposed for predicting the cubic compressive strength of concrete at any age. It is proved that the effect of stone-powder in proto-machine-made sand on concrete strength is virtually different from that of the crushed stone rust mixed with powdered mud in traditional machine-made sand, the limit content of stone powder lower than 5 % is not suitable for proto-machine-made sand to mix concrete in grade of C30.
Study on Strength Developing Regularity of Concrete with Proto-Machine-Made Sand
Li, Fenglan (author) / Zhu, Qian (author) / Ge, Zhanfang (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
Study on Strength Developing Regularity of Concrete with Proto-Machine-Made Sand
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