Mixed sand blend for concrete

Abstract

The invention provides a mixed sand blend for concrete. The mixed sand blend comprises the following raw materials by weight: 100 to 120 parts of fine sand capable of passing through a 100-to-120-mesh sieve, 80 to 100 parts of medium coarse sand capable of passing through a 60-to-80-mesh sieve, 30 to 50 parts of coarse sand capable of passing through a 10-to-20-mesh sieve, and 10 to 20 parts of silicon oxide particles. The mixed sand blend prepared in the invention absorbs a small amount of water, is easy to mix under stirring, can be easily matched with other raw materials of the concrete and enables the prepared concrete to have excellent performance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a mixed sand mixture for concrete. Background technique [0002] my country is rich in fine sand resources. There are a large number of ultra-fine sand resources in the Yangtze River Basin, Jialing River System, the middle and lower reaches of the Yellow River, the Pearl River Basin and the northwest region. The strength grade of concrete prepared with fine sand is higher, but due to the characteristics of high mud content, large specific surface area, and poor particle gradation of fine sand, the concrete mixed with medium sand has higher water consumption and lower particle size. Poor fluidity, and the poured structure is prone to cracks and other characteristics. These shortcomings make ultra-fine sand only limited to dry-hard concrete engineering structures. SUMMARY OF THE INVENTION [0003] In view of the above problems existing in the prior art, the applicant...

AI Technical Summary

Problems solved by technology

The strength grade of concrete prepared with fine sand is higher, but due to the characteristics of high mud content, large specific surface area, and poor particle gradation of fine sand, compared with medium sand mixed concrete, the mixed concrete has a larger useful water consumption, Poor fluidity, the poured structure is prone to cracks and other characteristics

These disadvantages make ultra-fine sand only limited to dry hard concrete engineering structures