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Anti-cracking high-strength coral mortar and preparation method thereof

A coral sand and high-strength technology, which is applied in the field of construction mortar, can solve the problems of poor workability, irregular shape, and high water absorption of coral mortar, so as to improve the strength and drying shrinkage behavior, reduce the use of cement, and reduce the heat release of hydration Effect

Pending Publication Date: 2022-07-12
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because coral sand has the characteristics of loose porous structure, irregular shape, high water absorption rate and high brittleness, the coral mortar prepared by conventional methods faces bottleneck problems such as poor workability, low strength and easy cracking.

Method used

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  • Anti-cracking high-strength coral mortar and preparation method thereof
  • Anti-cracking high-strength coral mortar and preparation method thereof
  • Anti-cracking high-strength coral mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] It can be seen from Example 1 and Example 4 that the reduction of the water-to-binder ratio improves the strength of coral mortar, but significantly reduces the fluidity;

[0072] It can be seen from Examples 5-8 that the addition of the polymer improves the tensile bond strength of the mortar and significantly improves the crack resistance of the coral mortar; with the incorporation of fibers, the cracking index decreases significantly; the cracking index increases with the polymer. and decreased with an increase in fiber incorporation;

[0073] It can be seen from Table 2 that the 28-day compressive strength of Examples 7-10 is all super high by 70MPa, which is more than 60% higher than that of Comparative Examples 1-2, and the fluidity is basically controlled between 170-200mm; Compared with the comparative example 1-2, the cracking index of Example 7-10 is greatly reduced; compared with the comparative example, the coral mortar of Example 7-10 has high compressive s...

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Abstract

The invention relates to the technical field of building mortar, and discloses an anti-crack high-strength coral mortar and a preparation method thereof, the mortar is prepared from the following raw materials by weight: 1220-1280 parts of coral sand; 480 to 560 parts of cement; 95 to 140 parts of industrial waste residue; 3.1 to 5.1 parts of an additive; 4.8 to 7.5 parts of a polymer; 3.8 to 6.1 parts of fiber; 250 to 280 parts of seawater; the coral sand is used as a fine aggregate, the industrial waste residue comprises slag powder, fly ash and silica fume, and the slag powder accounts for 70-75% of the total mass of the industrial waste residue. According to the invention, through scientific proportioning and optimization, the adverse effect of high brittleness of coral sand on the mortar strength is solved, so that the obtained coral mortar has good workability, the compressive strength is 70 MPa or above, the safety and reliability of a building structure can be ensured, and the engineering purpose of crack resistance is realized.

Description

technical field [0001] The invention relates to the technical field of building mortar, in particular to a crack-resistant high-strength coral mortar and a preparation method thereof. Background technique [0002] In recent years, due to the continuous development of the marine industry, the number of civil engineering construction on islands far from the coastline has gradually increased. Mortar, as the main building plastering and repairing material, has seen a significant increase in demand. However, in the marine environment, there is a shortage of raw materials for mortar production, especially sand and water resources. Transportation from the mainland brings huge energy consumption and carbon dioxide emissions. [0003] Therefore, choosing non-traditional and recycled seawater and coral sand to produce coral mortar is a promising way to not only solve the shortage of traditional building materials, but also alleviate the adverse impact of transportation, weather chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/38C04B22/00C04B18/14C04B18/08C04B16/06C04B14/46C04B14/38C04B14/28C04B111/34
CPCC04B28/04C04B14/28C04B22/0026C04B18/141C04B18/08C04B18/146C04B24/383C04B14/4643C04B14/386C04B16/0633C04B2201/50C04B2111/343C04B2103/302C04B2103/0057Y02W30/91
Inventor 焦楚杰何松松
Owner GUANGZHOU UNIVERSITY
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