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High-strength self-leveling mortar terrace material for surface layer and preparation method

A self-leveling mortar and floor material technology, which is applied in the field of high-strength self-leveling mortar floor materials and preparations, can solve the problems of low mechanical strength, easy pulverization, and easy cracking, and achieve good mechanical strength, flexural and compressive resistance High strength and long service life

Inactive Publication Date: 2018-02-06
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a high-strength self-leveling mortar floor material for the surface layer, and solve the problems of low mechanical strength, easy cracking and pulverization of ordinary self-leveling materials. At the same time, due to the regulation and toughening effect of graphene oxide on the morphology of cement hydration products, it can prolong its service life

Method used

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  • High-strength self-leveling mortar terrace material for surface layer and preparation method
  • High-strength self-leveling mortar terrace material for surface layer and preparation method
  • High-strength self-leveling mortar terrace material for surface layer and preparation method

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Embodiment 1

[0021] In terms of mass, the composition ratio is as follows: 38 parts of PⅡ42.5 cement, 17 parts of 70-90 mesh fine sand, 18 parts of 30-50 mesh medium sand, 19 parts of 300 mesh heavy calcium powder (calcium carbonate content is greater than 85%, Whiteness greater than 92), 51 parts of graphene oxide dispersion with a density of 7.4g / ml, "Wacker" 0.9 parts of redispersible latex powder, 0.1 parts of HY type polycarboxylate powder superplasticizer, 0.07 parts of hydroxypropyl methylcellulose ether water retaining agent (viscosity of 70000mpa.s), 0.06 parts of SG-10 gypsum retarder, P803 defoamer 0.02 parts, water-material mass ratio is 0.24; its performance is shown in Table 1 after testing.

Embodiment 2

[0023] In terms of mass, the composition ratio is as follows: 39 parts of PⅡ42.5 cement, 16 parts of 70-90 mesh fine sand, 19 parts of 30-50 mesh medium sand, 19 parts of 300 mesh heavy calcium powder (calcium carbonate content is greater than 85%, Whiteness greater than 92), 52 parts of graphene oxide dispersion with a density of 7.4g / ml, "Wacker" 0.8 parts of redispersible latex powder, 0.12 parts of HY type polycarboxylate powder superplasticizer, 0.06 parts of hydroxypropyl methylcellulose ether water retaining agent (viscosity of 70000mpa.s), 0.05 parts of SG-10 gypsum retarder, P803 defoamer 0.01 part, water-material mass ratio is 0.24; its performance is shown in Table 1 after testing.

Embodiment 3

[0025] In terms of mass, the composition ratio is as follows: 41 parts of PⅡ42.5 cement, 17 parts of 70-90 mesh fine sand, 20 parts of 30-50 mesh medium sand, 20 parts of 300 mesh heavy calcium powder (calcium carbonate content is greater than 85%, Whiteness greater than 92), 55 parts of graphene oxide dispersion with a density of 7.4g / ml, "Wacker" 1.0 parts of redispersible latex powder, 0.12 parts of HY type polycarboxylate powder superplasticizer, 0.10 parts of hydroxypropyl methylcellulose ether water retaining agent (viscosity of 70000mpa.s), 0.08 parts of SG-10 gypsum retarder, P803 defoamer 0.02 parts, water-material mass ratio is 0.24; its performance is shown in Table 1 after testing.

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Abstract

The invention discloses a high-strength self-leveling mortar terrace material for a surface layer, aiming at overcoming the disadvantages of a common self-leveling material that the mechanical strength is low and the common self-leveling material is easy to crack and pulverize. Meanwhile, graphene oxide has a regulation and control effect on a shape of a cement hydrated product and a toughening and reinforcing effect, so that the service life can be prolonged. The high-strength self-leveling mortar terrace material for the surface layer, disclosed by the invention, is prepared from the following components in parts by mass: 38 to 44 parts of ordinary portland cement, 16 to 20 parts of fine sand, 18 to 23 parts of medium sand, 19 to 25 parts of filling, 50 to 60 parts of a graphene oxide water dispersion solution, 0.8 to 1.3 parts of re-dispersible latex powder, 0.1 to 0.16 part of a water reducing agent, 0.06 to 0.12 part of a water-retaining agent, 0.05 to 0.08 part of a retarder and0.01 to 0.04 part of a de-foaming agent.

Description

technical field [0001] The invention relates to a floor material and a preparation method, in particular to a high-strength self-leveling mortar floor material used for a surface layer and a preparation method. Background technique [0002] Cement-based self-leveling mortar is composed of cementitious materials, fine aggregates, fillers, additives, water, etc. It is a ground material that can be flowed and leveled by its own weight. It has high fluidity, self-leveling, fast construction, and low labor intensity. Advantages and often used in office buildings, large shopping malls, schools, parking lots, factories and other concrete floors, the market potential is huge; at the same time, cement-based self-leveling material is also a brittle material, the mechanical characteristics are: high compressive strength, tensile and The bending strength is low, and it is easy to crack during practical application, resulting in a reduction in its strength and service life. [0003] Add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/02C04B111/62C04B111/34
CPCC04B14/024C04B28/04C04B2111/62C04B2111/343C04B14/06C04B14/28C04B2103/0057C04B2103/302C04B24/383C04B2103/22C04B2103/50
Inventor 李东旭张则瑞张树鹏戴浩琚诚兰
Owner NANJING UNIV OF TECH
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