High-performance cement-based material used for being poured into steel-concrete structure splicing joint

Abstract

The invention discloses a high-performance cement-based material for being poured into a steel-concrete structure splicing joint. The high-performance cement-based material is characterized by comprising cement, a mineral admixture, yellow sand, an additive and water, In the volume of the cement-based material, the cement accounts for 778-924 Kg / m < 3 >, the mineral admixture accounts for 128-206 Kg / m < 3 >, the yellow sand accounts for 966-1090 Kg / m < 3 >, and the water accounts for 226-265 Kg / m < 3 >; and the additive accounts for 0.42%-0.55% of the mass of the cement. The cement-based material has the characteristics of small aggregate particle size, high flowability, capability of pouring special-shaped components or cavities, compact structure and no vibration.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a high-performance cement-based material used for pouring into joints of steel-concrete structures. Background technique [0002] The existing ordinary concrete material or self-compacting concrete aggregate particle size is relatively coarse, but the internal cavity of the splicing joint of the new steel-concrete partially clad composite structure (PEC) is an irregular cavity formed by high-strength bolts, stirrups and structural bars Coarse aggregate with a larger nominal particle size cannot pass through, which is not conducive to pouring compaction. [0003] The cement-based materials that only contain fine aggregates that can be purchased on the market are expensive and should not be used in large quantities. [0004] The new steel-concrete partially clad composite structure (PEC) is a brand-new structural system. The pouring technology and equipment of its splicing joints...

AI Technical Summary

Problems solved by technology

[0002] The existing ordinary concrete material or self-compacting concrete aggregate particle size is relatively coarse, but the internal cavity of the splicing joint of the new steel-concrete partially clad composite structure (PEC) is an irregular cavity formed by high-strength bolts, stirrups and structural bars Coarse aggregate with a larger nominal particle size cannot pass through, which is not conducive to pouring compaction

[0003] The cement-based materials that only contain fine aggregates available in the market are expensive and should not be used in large quantities

[0004] The new steel-concrete partially clad composite structure (PEC) is a brand-new structural system. The pouring technology and equipment of its splicing joints are unique, and the matching between the original materials and equipment technology is not good.