Ultrahigh performance sea sand concrete and preparation method thereof

Abstract

The invention belongs to the technical field of a novel construction material and specifically relates to an ultrahigh performance sea sand concrete and a preparation method thereof. The ultrahigh performance sea sand concrete is prepared from cement, viscosity-reducing reinforcing agent, modified nanometer silicon dioxide dispersing solution, metakaolin, chloride ion curing agent, water reducingagent, de-foaming agent, sea sand, seawater and synthetic fiber at certain ratio. According to the invention, the viscosity-reducing reinforcing agent is adopted, so that the ultrahigh performance concrete still has better working property under the condition of lower water binder ratio; the modified nanometer silicon dioxide dispersing solution and the chloride ion curing agent are respectively adopted, so that the strength and durability of the ultrahigh performance concrete under normal temperature curing condition are greatly higher than those of the ultrahigh performance concrete at traditional silicon fume ratio; according to the invention, the sea sand and the seawater are used as some raw materials and are used for preparing the ultrahigh performance concrete, higher mechanical property and durability can be uniquely achieved in the manner of normal temperature moisturizing curing, the technical method is novel, the cost is lowered and the engineering can be practically popularized.

Description

technical field [0001] The invention belongs to the technical field of new building materials, and in particular relates to a sea sand ultra-high performance concrete and a preparation method thereof. Background technique [0002] Ultra-high performance concrete is characterized by ultra-high strength, toughness and durability, and has become a new system to achieve a great leap in the performance of cement-based materials. Ultra-high performance concrete originated in Denmark in the 1970s. Ultra-high-performance concrete is composed of graded quartz sand, finely ground quartz powder, cement, mineral admixtures, water reducers and other main components. During the setting and hardening process, it is cured by high-temperature steam to improve the microstructure of the finished product. [0003] Due to its ultra-high strength and other excellent performances, ultra-high performance concrete has received extensive attention from the international civil engineering community. ...

AI Technical Summary

Problems solved by technology

However, for a long time, since the curing of ultra-high-performance concrete needs to be cured by high-t

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