Gangue ready mixed mortar and preparation method thereof

A technology for ready-mixed mortar and coal gangue, applied in the field of building materials, can solve problems such as pollution, and achieve the effects of avoiding cost increase, stable quality and simple construction

Inactive Publication Date: 2012-12-12
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention not only helps to solve many problems such as long-term accumulation of coal gangue and environmental pollution, but also turns waste into treasure. It is in line with the national industrial policy of energy conservation, emission reduction, and environmental protection, and is conducive to popularization and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] Coal gangue ready-mixed mortar, its specific preparation method steps are as follows:

[0036] (1) The coal gangue is first crushed into fine particles in the crusher and then divided into two parts. Part I is classified according to the sand requirements of Zone 2 and used as coal gangue fine aggregate; Part II is ground in a ball mill to the required fineness. The surface area is controlled at 350-450m 2 / kg;

[0037] (2) Portland cement clinker and gypsum coagulant are ground in a ball mill to the required fineness according to the dosage ratio, and the specific surface area is controlled at 350-450m 2 / kg;

[0038] (3) Mix finely ground coal gangue fine powder, cement clinker, compound activator, high-efficiency water reducer, internal curing agent, coal gangue fine aggregate, and quartz sand according to the above ratio to make coal gangue cement mortar.

Embodiment 1

[0040] It is prepared by grinding various components into fine powder according to the above-mentioned method, and then mixing according to the following proportion by mass percentage.

[0041] Coal gangue fine powder 5.0%

[0042] Portland cement clinker 30.4%

[0043] Gypsum coagulant 1.0%

[0044] Compound activator 0.5%

[0045] Silica fume 2.0%

[0046] Superplasticizer 1.0%

[0047] Internal curing agent 0.1 %

[0048] Coal gangue fine aggregate 45.0%

[0049] Quartz sand 15.0%

[0050] The main physical performance indicators measured are: setting time 4h, 28-day strength 26.6MPa, water retention 95%, 14-day bond strength 1.64MPa, impermeability grade P6, mortar expansion rate 1.5×10 -2 %.

Embodiment 2

[0052] It is prepared by grinding various components into fine powder according to the above-mentioned method, and then mixing according to the following proportion by mass percentage.

[0053] Coal gangue fine powder 10.0%

[0054] Portland cement clinker 25.9%

[0055] Silica fume 2.0%

[0056] Gypsum coagulant 1.0%

[0057] Compound activator 2.0%

[0058] Superplasticizer 1.0%

[0059] Internal curing agent 0.1 %

[0060] Coal gangue fine aggregate 45.0%

[0061] Quartz sand 15.0%

[0062] The main physical performance indicators measured are: setting time 4h, 28-day strength 20.1MPa, water retention 92%, 14-day bond strength 1.20MPa, impermeability grade P6, expansion rate 1.1×10 -2 %.

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Abstract

The invention discloses gangue ready mixed mortar and a preparation method of the gangue ready mixed mortar. The gangue ready mixed mortar is formed by mixing gangue fine powder, silicate cement clinker, silica fume, a composite fine aggregate, a composite exciter, an inner curing agent and gypsum mixing control agent according to proper mass percentages through a certain process, wherein the content of the gangue fine powder is 5 to 20 percent; and the content of the gangue fine aggregate is 15 to 60 percent. The physical performance indexes such as strength, viscosity, water-retaining property, condensation time and stretching adhesive strength of the gangue ready mixed mortar can meet the standard requirements in a building material industry, and demands for masonry and wall surface plastering can be met. With the adoption of the gangue ready mixed mortar, the problems of long-time accumulation of gangue and environment pollution are solved, and the gangue is turned into wealth; the industrial policies in energy conservation, emission reduction and environment protection in China are met; and the gangue ready mixed mortar is favorable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a coal gangue ready-mixed mortar and a preparation method thereof. Background technique [0002] Ready-mixed mortar refers to various mortar mixtures produced by specialized manufacturers and used in construction projects. It is a new type of building material developed in my country in recent years. At present, the on-site mixing mortar has increasingly shown its inherent defects, such as unstable mortar quality, large waste of materials, single type of mortar, and low level of civilized construction, which makes it difficult to guarantee the quality of construction projects, and at the same time causes serious pollution to the urban environment. Therefore, the Ministry of Construction and other six ministries and commissions jointly issued the "Notice on Prohibiting On-site Mixing Mortar in Some Cities within a Time Limit", requiring 127 cities to ban the use of ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/12
CPCY02W30/91
Inventor 马先伟牛季收张国强朱凯姚立阳
Owner HENAN UNIV OF URBAN CONSTR
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