Self-compacting concrete for floor heating protection layer and preparation method thereof

Abstract

The invention discloses a self-compacting concrete for a floor heating protection layer and a preparation method thereof, the self-compacting concrete comprises the following raw materials in percentage by mass: 30%-35% of fluidized bed combustion ash, 35%-40% of slag, 12%-18% of cement, 1.0%-2.0% of a water reducing agent and 15%-18% of water, and the sum of the mass percentages of the raw materials is 100%. According to the invention, the furnace slag is used as aggregate, the fluidized bed combustion ash and the cement are used as gel materials, and the volcanic ash activity, self-hardening performance and expansion performance of the fluidized bed combustion ash are fully utilized; shrinkage cracking of the floor heating protection layer is avoided; as the apparent density of the furnace slag is small, the dry apparent density of the self-compacting concrete prepared from the fluidized bed combustion ash and the furnace slag is small, and the increased load on the floor is small.

Description

technical field

[0001] The invention belongs to the technical field of self-compacting concrete, and in particular relates to self-compacting concrete used for floor heating protective layers and a preparation method thereof. Background technique

[0002] With the rapid promotion of low-temperature floor heating technology, "Technical Regulations for Radiant Heating and Cooling" (JGJ142-2012) stipulates that the floor heating protection layer requires the use of pea-stone concrete or M10 cement mortar with a strength grade of C15; among them, pea-stone concrete The particle size of pea stone should be 5mm-12mm; most of the actual projects use C15 fine stone concrete; the concrete protective layer disclosed in the Chinese patent application "a low-temperature floor radiation heating construction structure (application number: 201320189530.6)" is made of cement, yellow The ratio of sand and bluestone is 1:2:3, and the thickness is 15mm to 50mm; however, due to the large surfac...

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