Self-thermal-insulation mortar

Abstract

The invention discloses a self-thermal-insulation mortar including, by weight, 20-40 parts of cement, 5-60 parts of yellow sand and 1-8 parts of a main activator, wherein the main activator is hydrotalcite or a hydrotalcite-like material. In the formula of the self-thermal-insulation mortar, the cement, the yellow sand and the main activator are compounded so that a synergetic effect is achieved. A complex reaction between microscale polyvalent metal ions in the cement and the main activator is carried out, and then the microscale polyvalent metal ions is complexed at a quartz sand-water interface or a silicon dioxide-water interface for activating surfaces of the cement and the quartz sand to change a conventional stacking status of the cement, thereby forming a giant network complexing structure in the system. Meanwhile, when the main activator is complexed with the microscale polyvalent metal ions, interlayers in the main activator is expanded to uniformly form nanopores of which diameters are about 1-5 nm, so that the building block is excellent in strength, thermal-insulating performance, water-retaining property, constructability and the like.

Description

technical field [0001] The invention relates to building materials, in particular to a self-insulating mortar. Background technique [0002] Cement is known as the grain of the construction industry. Even today when new building materials continue to appear, cement is still the most important building material. Cement mortar developed with cement as the base material is a kind of particle physically mixed in a certain proportion by drying and screening aggregates such as quartz sand, inorganic cementitious materials such as cement, and admixtures such as polymers. Shaped or powdered materials; they are transported to the construction site in bags or in bulk, and can be used directly after mixing with water. [0003] There is a kind of thermal insulation mortar in the mortar, which can produce micropores after the mortar is formed by adding some foaming agent and / or some light fillers with micropores to the base mortar, reducing the dry density of the mortar, making it It h...

AI Technical Summary

Problems solved by technology

[0006] 2. The water retention rate of the blocks or walls obtained after molding is low, so the coating is easy to fall off when the wall surface is plastered; the water retention rate is not uniform, and the wall or block parts are prone to accumulate moisture, which bursts from the large pores. As a result, in cloudy and rainy weather, the wall surface made of this kind of mortar is prone to local water spots and mildew, which affects the appearance of the wall, and the blocks are also prone to local cracks due to environmental reasons such as water vapor.