Calcium enriched grout admixture and its preparation method and use method

Abstract

The present invention relates to a calcium-increased type mortar blending material, its preparation method and application method. Said mortar blending material contains (by wt%) 69-89% of fly ash, 0.5-1.5% of anhydrous sodium sulfate, 0.05-0.2% of silane coupling agent, 0.03-0.07% of triethanolamine, 10-30% of quicklime powder, 0.005-0.1% of building cured adhesive powder, 0.01-0.02% of polyvinyl alcohol powder and 0.01-0.05% of lignocellulose. Besides, said invention also provides the concrete steps of its preparation method and application method.

Description

technical field [0001] The invention relates to a building material and its preparation method and use method, in particular to a mortar admixture with fly ash as the main raw material and its preparation method and use method. Background technique [0002] In order to improve the workability and reduce segregation, the existing masonry mortar often adopts the method of adding lime or more cement. As a result, the overall cost of the mortar is relatively high, and drying shrinkage is easy to occur. Adding ordinary fly ash as an admixture to mortar is an existing practice in construction, but due to the uneven quality of fly ash, the performance varies greatly. Although some can improve the mechanical properties and durability of mortar, most of them can improve the mechanical properties and durability of mortar. Partly due to the lack of fly ash activity, the dosage generally does not exceed 15% of the cement dosage, and after adding it, the early strength of the mortar is o...

AI Technical Summary

Problems solved by technology

Adding ordinary fly ash as an admixture to mortar is an existing practice in construction, but due to the uneven quality of fly ash, the performance varies greatly. Although some can improve the mechanical properties and durability of mortar, most of them can improve the mechanical properties and durability of mortar. Partly due to the lack of fly ash activity, the dosage generally does not exceed 15% of the cement dosage, and after adding, the early strength of the mortar is often reduced

During construction, the existing plastering mortar needs to add a variety of admixtures in order to improve the adhesion, crack resistance, and prevent hollowing, which brings inconvenience to the construction

Due to the variety of materials added, the performance is unstable, and the physical and chemical properties of raw materials in different regions and batches are different. Before each use, various raw materials must be tested to determine the on-site construction ratio, and the preparation and construction are complicated.