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Quick-hardened early-strengthened non-cracking surface layer self-leveling mortar and preparing method thereof

A technology of self-leveling mortar and surface layer, applied in the field of self-leveling mortar, can solve the problems of needing maintenance, insufficient compressive strength, cracking, etc., and achieve the effect of solving the cracking of ground leveling hollow drum, improving construction efficiency and reducing cost

Inactive Publication Date: 2018-09-11
浙江恒起新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the material, it can be divided into gypsum-based self-leveling mortar and cement-based self-leveling mortar. Cement-based self-leveling mortar has high strength, high hardness, and abrasion resistance. The disadvantage of cement-based self-leveling mortar is that it has low early strength and requires maintenance. There are problems such as hollowing and cracking
Gypsum-based self-leveling mortar has high early strength and small expansion and contraction. Its disadvantages are that it is not resistant to water, has poor surface hardness, is not wear-resistant, and is prone to a series of problems such as sand loss.
Due to the direct contact with other objects, the surface layer self-leveling mortar is prone to peeling, sanding, pitting and cracking during use. The main reason is not that the compressive strength is insufficient, but the surface flexibility and wear resistance are not enough.

Method used

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  • Quick-hardened early-strengthened non-cracking surface layer self-leveling mortar and preparing method thereof

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preparation example Construction

[0035]A preparation method of rapid-hardening, early-strength and non-cracking surface layer self-leveling mortar, comprising the following steps:

[0036] 1) Add water and stir evenly so that the initial fluidity of the mortar is 150±5mm. The fluidity of the self-leveling mortar is measured by the degree of expansion of the mortar. According to the test standard, pour the mortar into a sleeve with a diameter of 3cm and a height of 5cm. Then lift it up, the mortar flows freely and spreads out into a circle, and the diameter of the circle is the degree of fluidity;

[0037] 2) Evenly spread the stirred self-leveling mortar on the base surface coated with the interface agent, use the rake to assist the leveling, and then roll it back and forth several times with the defoaming roller;

[0038] 3) After the mortar is hardened and dried, polish the surface of the mortar and evenly apply a layer of polyurethane finishing agent.

[0039] Preferably, in step 1), the mass ratio of wat...

Embodiment 1

[0043] A fast-hardening, early-strength, non-cracking surface layer self-leveling mortar is composed of the following raw materials by mass percentage: α-hemihydrate gypsum 50%, 52.5 white cement 10%, heavy calcium 5%, quartz sand 12.78%, quartz powder 20% , retarder 0.1%, water reducing agent 0.3%, redispersible latex powder 0.5%, thickening stabilizer 0.03%, defoamer 0.17%, pigment 0.28%, silica fiber 0.4%, waterproofing agent 0.2%, Coalescing aid 0.3%.

[0044] The preparation method of the fast-hardening and early-strength non-cracking surface layer self-leveling mortar comprises the following steps:

[0045] 1) According to the water-to-powder ratio of 0.20:1, add water and stir evenly, and the initial fluidity of the mortar is 152mm after testing;

[0046] 2) Evenly spread the stirred self-leveling mortar on the base surface coated with the interface agent, use the rake to assist the leveling, and then roll it back and forth several times with the defoaming roller;

[...

Embodiment 2

[0049] A fast-hardening, early-strength, non-cracking surface layer self-leveling mortar is composed of the following raw materials by mass percentage: α-hemihydrate gypsum 40%, 52.5 white cement 15%, heavy calcium 11.4%, quartz sand 14%, quartz powder 15% , retarder 0.15%, water reducing agent 0.35%, redispersible latex powder 0.8%, thickening stabilizer 0.05%, defoamer 0.3%, pigment 0.5%, silica fiber 1.0%, waterproofing agent 0.5%, Coalescing aid 0.32%.

[0050] The preparation method of the fast-hardening and early-strength non-cracking surface layer self-leveling mortar comprises the following steps:

[0051] 1) According to the water and powder ratio of 0.21:1, add water and stir evenly, and the initial fluidity of the mortar is 155mm after testing;

[0052] 2) Evenly spread the stirred self-leveling mortar on the base surface coated with the interface agent, use the rake to assist the leveling, and then roll it back and forth several times with the defoaming roller;

...

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Abstract

The invention discloses quick-hardened early-strengthened non-cracking surface layer self-leveling mortar. The mortar is prepared from, by mass, 30-60% of semi-hydrated gypsum, 5-20% of cement, 5-15%of coarse whiting, 10-30% of quartz sand, 10-20% of quartz powder, 0.05-0.25% of retarder, 0.2-0.5% of water reducing agent, 0.1-1.0% of redispersible powder, 0.03-0.1% of thickening stabilizer, 0.1-0.5% of defoaming agent, 0.1-0.5% of pigment, 0.4-1.0% of silicon dioxide fiber, 0.2-0.5% of water-proofing agent and 0.3-1.0% of coalescing agent. The invention further discloses a preparing method ofthe quick-hardened early-strengthened non-cracking surface layer self-leveling mortar. The self-leveling mortar has the advantages of being quick in hardening, early in strengthening, free of cracking and curing, resistant to wear and water, free of formaldehyde, easy to construct, high in adaptability and the like. The self-leveling mortar is mainly used for houses, schools, cinemas, shopping malls, workshops and other ground high-end leveled places.

Description

technical field [0001] The invention relates to the field of self-leveling mortar, in particular to a self-leveling mortar with rapid hardening, early strength and non-cracking surface layer and a preparation method thereof. Background technique [0002] Self-leveling mortar is a kind of special mortar, which has load-bearing and decorative functions. Self-leveling mortar can be mixed with water to form a free fluid slurry, which can be quickly unfolded to obtain high flatness, which can greatly reduce labor costs and improve construction efficiency. The efficiency of traditional manual leveling is 5-10 times higher, and it can provide traffic and load bearing in a short time, greatly shortening the construction period, and the construction site is clean and tidy. [0003] Self-leveling mortar can be divided into surface layer self-leveling and cushion layer self-leveling according to construction requirements. The two are generally used in combination. The surface layer sel...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B41/63C04B111/62
CPCC04B28/146C04B28/147C04B41/4884C04B41/63C04B2111/62C04B2201/05C04B2201/50C04B2201/52C04B7/02C04B14/28C04B14/06C04B24/14C04B2103/302C04B24/2623C04B24/383C04B24/38C04B24/42C04B14/308C04B14/4631C04B24/32C04B11/032C04B7/32C04B7/323
Inventor 程雲洪琴
Owner 浙江恒起新材料科技有限公司
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