Highly dense alkali-activated coating material

Abstract

The invention relates to a highly dense alkali-activated coating material which is used for repairing and protecting underground spaces and outer spaces of buildings, particularly surface repairing and protection of exterior walls, basements, water conservancy projects, tunnels, bridges, roads, yards and water pools, and belongs to the field of building materials. The highly dense alkali-activated coating material specifically comprises the following components in parts by weight: 2-80 parts of an alkali-activator, 20-120 parts of a gelatinized base material, 2-250 parts of sheet aggregates, 0-20 parts of a water repellent, 0-20 parts of a colorant, 0-80 pars of an expanding agent, 0-200 parts of filler and 0-50 parts of auxiliaries.

Description

technical field [0001] The invention relates to a high-density alkali-activated coating material, which is used for the repair and protection of underground spaces and building exterior surfaces, and is especially suitable for surface restoration and protection of exterior walls, basements, water conservancy projects, tunnels, bridges, highways, docks, and pools. Protection belongs to the field of building materials. Background technique [0002] Geopolymer cement is a new type of alkali-activated cementitious material developed by J Davidovits of France in the late 1970s. Formed under the action of the agent. The silicon-aluminum oxide compound in the minerals of geopolymeric cement raw materials has undergone a process from depolymerization to repolymerization, forming a structure similar to some natural minerals in the earth's crust, and is a new type of cementitious material with excellent durability. Many minerals or mineral mixtures will have pozzolanic activity or p...

AI Technical Summary

Problems solved by technology

The biggest defect of cement mortar is that the bond with concrete is not strong enough and it is easy to fall off. Therefore, this method is generally used in less important occasions, and has become less and less in important occasions.

[0004] Although alkali-activated gelling materials have many excellent properties, the practical application of alkali-activated gelling materials is very rare, and even some technologies that have applied for patents are hardly fully implemented in actual engineering. There are still some defects in the cementitious material itself, mainly because of its large shrinkage, which is prone to cracks. In the rapidly solidified alkali-activated cementitious material, it is full of capillary pores, loose in structure, and poor in protection ability.

[0005] The patent with the application number 201010299679.0 titled "A Two-Component Environmentally Friendly Inorganic Polymer Coating Material and Its Preparation Method" is a typical formula of alkali-activated gelling materials. The solidification of the coating, because the alkali-activated gelling material is a hydrophilic material, the hardening accelerator will make the coating material solidify quickly before the water evaporates completely, and a large number of capillaries will be left in the cured coating material after the water evaporates. Pores, so the structure is loose, unable to block the intrusion of water and air