Light, thermal-insulating and early-strength type cement-based ground self-leveling material and preparation method thereof

Abstract

The invention relates to a light, thermal-insulating and early-strength type cement-based ground self-leveling material and a preparation method thereof. The material comprises the following components in parts by weight: 40-50 parts of ordinary Portland cement, 5-10 parts of rapid-hardening early-strength cement, 5-15 parts of mineral admixtures, 30-40 parts of lightweight aggregate, 1-5 parts of a toughening agent,0.4-1 part of redispersible latex powder, 0.1-0.3 parts of a water reducing agent, 0.1-0.2 parts of an excitant, 0.1-0.3 parts of a defoaming agent and 0-0.2 parts of a water-retaining agent. The material has the beneficial effects as follows: the construction process is simple, the mobility is good, the early strength is high, no contraction appears in the later period, and cracking is avoided, so that the material has better social benefits and economic benefits, and can be widely applied to projects of ground leveling and broken-ground remolding in new houses.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a light heat-preservation early-strength cement-based ground self-leveling material and a preparation method thereof. Background technique [0002] Self-leveling material is a new type of ground material that uses inorganic or organic gelling materials as the base material and is modified by adding suitable admixtures for leveling the ground. The ground self-leveling material is mixed into a slurry and then poured on the floor. It will automatically level under the action of its own weight, which can overcome the common quality problem that the flatness of the ordinary cement mortar floor is difficult to control. Cement-based self-leveling mortar has become an ideal building material for modern building ground construction due to its good fluidity and stability, high early strength, fast construction speed, and low labor intensity. [0003] Compared with d...

AI Technical Summary

Problems solved by technology

[0004] (1) Low early strength

In order to ensure its fluidity, cement-based self-leveling mortar generally has a high water-cement ratio, and fine sand is used as aggregate at the same time, resulting in insufficient early strength of the mortar, which directly affects the construction process and the time when the project is put into use

[0005] (2) Insufficient thermal insulation performance

Self-leveling mortar is generally only 3-10mm, and the thermal insulation performance is generally poor

[0006] (3) The surface flatness of the mortar is not enough, and the anti-seepage performance is poor

Due to factors such as mortar formula and construction instability, coupled with the infiltration of ground moisture, surface sanding, peeling, hollowing and other phenomena are prone to occur, which not only affects the appearance, but also directly endangers the quality of self-leveling mortar

[0007] (4) After the mortar is hardened, it is easy to shrink and cause surface cracking

Chinese invention patent ZL20121017929.3 discloses "A Self-Leveling Mortar Mixed with Low-Temperature Rice Husk Ash". early strength, but did not achieve the light weight and thermal insulation performance of self-leveling mortar