Fiber reinforced high performance concrete for embankment side ditch

Abstract

The invention discloses fiber reinforced high performance concrete for an embankment side ditch. The concrete comprises the following components in parts by weight: 100 parts of cement, 161-184 partsof zone II medium sand, 170-184 parts of crushed stone with a particle size of 5-10 mm, 33-34 parts of water, 32-40 parts of an admixture, 1.2-1.5 parts of an additive, and 0.45-1 part of a syntheticfiber. In the concrete formulation, by addition of the admixture formed by a mixture of two or more of silica fume, fly ash, metakaolin, zeolite powder, limestone powder and quartz powder, mechanicalproperties of the concrete are effectively improved; and the used polycarboxylic acid additive can work together with the admixture to improve a particle piling-up state, promote full interactive hydration of ultra-fine powders with different activities, improve reactivity of a cementitious material, and further improve strength of the high-strength concrete.

Description

technical field [0001] The invention relates to the field of cement concrete and expressway construction technology, in particular to a fiber-reinforced high-performance concrete for side ditches of embankments. Background technique [0002] Structural industrialization is in line with the current national policy requirements for the promotion of green roads and the development of the four types of transportation, and it is also a positive means to achieve intensive, advanced, high-quality, high-efficiency, environmental protection, and economic construction goals. But for the current conventional concrete structure, due to its bulky structure and high transportation costs, it is very difficult to realize industrialization. Therefore, material or structural innovation must be carried out to break through the existing bottleneck. [0003] The side ditch of the roadbed of the traditional newly-built or expanded expressway is mostly an integral prefabricated block with a thickn...

AI Technical Summary

Problems solved by technology

At present, ultra-high performance concrete, which is widely used, has high requirements on fibers and external admixtures, and the corresponding cost will also increase exponentially.