Low-shrinkage and high-strength concrete material using aeolian sand and gobi gravels as main raw materials and preparation method of low-shrinkage and high-strength concrete material

Abstract

The invention discloses a low-shrinkage and high-strength concrete material using aeolian sand and gobi gravels as the main raw materials and a preparation method of the low-shrinkage and high-strength concrete material. The low-shrinkage and high-strength concrete material mainly comprises 568.1-604.8 parts of Portland cement, 284.1-302.4 parts of fine sinking beads, 94.7-100.8 parts of silica fume, 589.4-785.7 parts of aeolian sand, 294.6-491.2 parts of gobi gravels, 3.8-20.2 parts of water reducing agent and 161.3-227.3 parts of water. The low-shrinkage and high-strength concrete material and the preparation method thereof have the advantages that the low-shrinkage and high-strength concrete material is simple in preparation process, and the high-strength concrete material which is excellent in various performance such as flowability, strength and long-term stability can be prepared by using a conventional concrete forcing type single horizontal shaft agitator; in addition, the aeolian sand and the gobi gravels which are cheap natural materials rich in reserves are used, the concrete prepared by using the aeolian sand and the gobi gravels to replace materials such as natural river sand and basalt gravels is the inexorable trend of engineering material development, the preparation method is widely applicable to the great northwest region of China, local materials can be utilized, measures can be adjusted according to local conditions, and great economic and social benefits can be achieved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a low-shrinkage high-strength concrete material mainly composed of aeolian sand and Gobi gravel and a preparation method thereof. Background technique [0002] Concrete is the most widely used artificial building material in the world. It is a multiphase composite material mainly composed of cementitious materials, sand, water and admixtures. It has high compressive strength, good workability, and good fire resistance. And the resistance to environmental erosion is the main reason for the promotion and use of engineering circles. Sand and gravel are commonly used raw materials for mixing concrete. At present, the commonly used sand is natural river sand, because natural river sand has the characteristics of moderate moisture content, good particle gradation, and small mud content. The concrete made of it can well meet the engineering requirements. Require. However,...

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Problems solved by technology

However, the reserves of natural river sand in nature are very small. With the massive consumption of engineering construction, natural high-quality river sand is becoming less and less, which has seriously affected and restricted the use and development of concrete.

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