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160MPa super-strength concrete with high cracking resistance and high fluidity
The invention relates to 160MPa super-strength concrete with high cracking resistance and high fluidity to meet performance requirements such as premixing production, on-site pumping construction and anti-bounce capability. The concrete comprises the following components by weight (kg/cm<3>): 645-680kg of cement, 280-300kg of mineral powder, 160-190kg of coal ash, 252-283kg of silica ash, 980-1,080kg of natural sand, 238-260kg of steel fiber, 40-48kg of an additive and 160-169kg of mixing water, wherein the additive is a high-performance polycarboxylic water reducer. The slump flow of the concrete is kept within 750mm+/-50mm within 3h, the 56d normal-curing compression strength is above 160MPa, the 56d normal-curing breaking strength is above 25MPa, and the concrete can be produced and prepared in a large scale on the basis of a common concrete mixing technology and can be transported to a construction site within 25km by a mixer truck. According to the 160MPa super-strength concrete, the problems of large-scale automatic production and preparation and remote on-site pumping and pouring construction are solved, and abundant ultrafine natural sand accumulated in the Yangtze River basin can be fully utilized.
160MPa super-strength concrete with high cracking resistance and high fluidity
The invention relates to 160MPa super-strength concrete with high cracking resistance and high fluidity to meet performance requirements such as premixing production, on-site pumping construction and anti-bounce capability. The concrete comprises the following components by weight (kg/cm<3>): 645-680kg of cement, 280-300kg of mineral powder, 160-190kg of coal ash, 252-283kg of silica ash, 980-1,080kg of natural sand, 238-260kg of steel fiber, 40-48kg of an additive and 160-169kg of mixing water, wherein the additive is a high-performance polycarboxylic water reducer. The slump flow of the concrete is kept within 750mm+/-50mm within 3h, the 56d normal-curing compression strength is above 160MPa, the 56d normal-curing breaking strength is above 25MPa, and the concrete can be produced and prepared in a large scale on the basis of a common concrete mixing technology and can be transported to a construction site within 25km by a mixer truck. According to the 160MPa super-strength concrete, the problems of large-scale automatic production and preparation and remote on-site pumping and pouring construction are solved, and abundant ultrafine natural sand accumulated in the Yangtze River basin can be fully utilized.
160MPa super-strength concrete with high cracking resistance and high fluidity
CHEN JIANDA (author) / WU DELONG (author) / ZHU MINTAO (author) / LI LINGYU (author)
2015-08-26
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Properties of high-strength and high-fluidity lightweight concrete
| Tema Archive | 1998