Self-compacting concrete and preparation method thereof

Abstract

The invention relates to the technical field of concrete, in particular to self-compacting concrete and a preparation method thereof. The self-compacting concrete is prepared from the following components in parts by mass: 460 to 475 parts of water, 990 to 1013 parts of cement, 1960 to 1975 parts of medium sand, 2165 to 2190 parts of gravel, 105 to 116 parts of fly ash, 270 to 282 parts of mineral powder, 45 to 52 parts of a concrete pumping agent, 105 to 116 parts of an expansion anti-cracking agent and 5 to 10 parts of a concrete glue reducing agent, wherein the fineness modulus of the grain size of the medium sand is 2.4-2.8, and the grain size of the gravel is 5-20 mm; the concrete pumping agent is a Point-400H type pumping agent; and the expansion anti-cracking agent is an SY-G type expansion anti-cracking agent. The self-compacting concrete is prepared through primary mixing of materials, a hydration reaction and final mixing of the materials and has an excellent self-compacting effect; a preparation process is simple; and large-scale preparation of the concrete is facilitated.

Description

technical field [0001] The application relates to the technical field of concrete, more specifically, it relates to a self-compacting concrete and a preparation method thereof. Background technique [0002] Concrete refers to a mixture of cementitious materials (organic, inorganic or both), granular aggregates, water, chemical admixtures and mineral admixtures that need to be added in an appropriate proportion, or formed after hardening. Polymeric composite materials. [0003] Although the existing concrete materials have high compressive strength and good durability, they are prone to problems such as air bubbles and cavities. Most of the concrete needs to be vibrated and compacted during grouting. However, in the actual operation process, due to the structure of grouting (such as too dense arrangement of steel bars) and shape (such as the twists and turns of the finished concrete product), the effect of vibration compaction is not good. [0004] In view of the related te...

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Problems solved by technology

[0003] Although the existing concrete materials have high compressive strength and good durability, they are prone to problems such as air bubbles and cavities. Most of the concrete needs to be vibrated and compacted during grouting

However, in the actual operation process, due to the grouting structure (such as too dense arrangement of steel bars) and shape (such as the twists and turns of the finished concrete product), the effect of vibration compaction is not good.

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