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Self-leveling mortar doped with low-temperature rice hull ash

A technology of self-leveling mortar and rice husk ash, applied in the field of building materials, can solve the problems of restricting the use and promotion of self-leveling mortar, unable to overcome shrinkage cracking, and high production cost, and achieves reduced shrinkage, smooth surface and high early strength. Effect

Inactive Publication Date: 2012-09-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the production cost of self-leveling mortar is relatively high, and it cannot overcome the late shrinkage and cracking. After hardening, the surface is often uneven and easy to powder, which restricts the use and promotion of self-leveling mortar in my country.

Method used

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  • Self-leveling mortar doped with low-temperature rice hull ash
  • Self-leveling mortar doped with low-temperature rice hull ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1, a self-leveling mortar mixed with low-temperature rice husk ash, according to 42.5 grade ordinary Portland cement 100, high-alumina cement 10, low-temperature rice husk ash 10, slag powder 5, fly ash 5, river sand 150 , water reducer 0.05, defoamer 0.02, stabilizer 0.04, expansion agent 2, water 25 weight ratio prepared. The performance test results are shown in Table 1.

Embodiment 2

[0055] Example 2, a self-leveling mortar mixed with low-temperature rice husk ash, according to 52.5 grade ordinary Portland cement 100, high-alumina cement 20, low-temperature rice husk ash 15, slag powder 10, fly ash 10, river sand 200 , water reducer 1.00, defoamer 0.04, stabilizer 0.06, expansion agent 4, water 35 weight ratio prepared. The performance test results are shown in Table 1.

Embodiment 3

[0056] Example 3, a self-leveling mortar mixed with low-temperature rice husk ash, according to 42.5 grade ordinary Portland cement 100, high-alumina cement 25, low-temperature rice husk ash 20, slag powder 15, fly ash 15, river sand 250 , water reducer 1.50, defoamer 0.06, stabilizer 0.08, expansion agent 5, water 45 weight ratio prepared. The performance test results are shown in Table 1.

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to self-leveling mortar doped with low-temperature rice hull ash. The self-leveling mortar consists of normal Portland cement, high alumina cement, low-temperature rice hull ash, slag powder, fly ash, river sand, a water reducing agent, a defoaming agent, a stabilizing agent and water. The low-temperaturerice hull ash is formed by burning rice hulls at a low temperature of 600 DEG C and grinding, has a huge surface area and super-high pozzolanic activity. According to a product provided by the invention, the problems of high cost, unsmooth hardened surface, shrinkage and crack of the normal self-leveling mortar can be solved, and meanwhile, the problem of treatment of the agricultural rice hulls can also be solved. The product provided by the invention has the characteristics of high fluidity, quickness in condensation and hardening, high early strength, smooth and flat hardened surface, solidness, wear resistance, small shrinkage, no crack and the like, is suitable for construction of a new floor, can also be used for repairing worn, dusting and damaged floor and can be used for self-leveling of various floor base courses.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a self-leveling mortar mixed with low-temperature rice husk ash. Background technique [0002] More than 40 million tons of rice husks are produced in my country every year. The treatment of rice husks in my country, except for a very small part used for fuel, animal feed, filler for wine fermentation and field fertilizer, most of them are treated as agricultural waste or burned in the wild, which poses great harm to road traffic safety and the environment. The construction of the traditional cement mortar floor requires manual paving, scraping, plastering and other processes after the mortar is mixed. This kind of multi-layer construction reduces the adhesion between the ground and the concrete base, and a large number of cracks are generated on the ground surface due to the excessive amount of cement, resulting in reduced impermeability, wear resistance and smoothne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B18/30
CPCY02W30/91
Inventor 孙振平陈明
Owner TONGJI UNIV
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