Alkali-activated slag mortar mixed material and preparation method thereof

A technology for mixing materials and slag sand, which is applied in the field of alkali-excited slag mortar mixed materials and its preparation, can solve the problems of fast coagulation, large shrinkage and easy cracking, and achieves delaying coagulation time, improving distribution and orientation, good working performance and The effect of mechanical properties

Inactive Publication Date: 2021-04-30
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an alkali-activated slag mortar mixed material and its preparation method, aiming to solve the technical problems of the existing alkali-activated slag materials such as fast coagulation, large shrinkage and easy cracking

Method used

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  • Alkali-activated slag mortar mixed material and preparation method thereof
  • Alkali-activated slag mortar mixed material and preparation method thereof
  • Alkali-activated slag mortar mixed material and preparation method thereof

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preparation example Construction

[0030] Correspondingly, an embodiment of the present invention provides a method for preparing an alkali-activated slag mortar mixed material, which includes the following steps:

[0031]S1. Provide alkali-activated slag mortar, rigid fiber and tetrasodium hydroxyethylene diphosphonate;

[0032] S2. Mixing the alkali-activated slag mortar, the rigid fiber and tetrasodium hydroxyethylene diphosphonate to obtain the alkali-activated slag mortar mixed material.

[0033] The preparation method of the alkali-activated slag mortar mixed material provided by the embodiment of the present invention is simple to operate, does not require high equipment, and is conducive to realizing industrial scale production. The obtained alkali-activated slag mortar mixed material has good working performance and mechanical properties, which can meet the actual construction needs.

[0034] Specifically, in S1, the alkali-activated slag mortar can be conventional alkali-activated slag mortar in the ...

Embodiment 1

[0040] This embodiment provides a method for preparing an alkali-activated slag mortar mixed material, the steps are as follows:

[0041] (11) Accurately weigh 840 parts of slag, 1260 parts of sand, 24.33 parts of sodium hydroxide, 314.68 parts of water, 101.64 parts of water glass, 2.52 parts of tetrasodium hydroxyethylidene diphosphonate (accounting for 0.99‰ of the weight of alkali-activated slag mortar ) and 80 parts of steel fiber; wherein, the slag is S95 grade, which meets the index requirements of S95 grade slag powder in GB / T 18046; the sand is ISO standard sand produced in accordance with the requirements of GB / T17671-1999; sodium hydroxide is granular, The purity is 96%; the modulus of water glass is 3.34, and the mass percentage of water content is 62.3%; the length of steel fiber is 13mm, the diameter is 0.2mm, the tensile strength is ≥2000MPa, and the density is 7870kg / m 3 straight steel fibers;

[0042] (12) Alkali activator preparation: After mixing water glas...

Embodiment 2

[0045] This embodiment provides a method for preparing an alkali-activated slag mortar mixed material, the steps are as follows:

[0046] (21) Accurately weigh 840 parts of slag, 1260 parts of sand, 24.33 parts of sodium hydroxide, 314.68 parts of water, 101.64 parts of water glass, 5.04 parts of tetrasodium hydroxyethylidene diphosphonate (accounting for 1.98‰ of the weight of alkali-activated slag mortar ) and 80 parts of steel fiber; wherein, the slag is S95 grade, which meets the index requirements of S95 grade slag powder in GB / T 18046; the sand is ISO standard sand produced in accordance with the requirements of GB / T17671-1999; sodium hydroxide is granular, The purity is 96%; the modulus of water glass is 3.34, and the mass percentage of water content is 62.3%; the length of steel fiber is 13mm, the diameter is 0.2mm, the tensile strength is ≥2000MPa, and the density is 7870kg / m 3 straight steel fibers;

[0047] (22) Alkali activator preparation: After mixing water glas...

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Abstract

The invention belongs to the technical field of cement-based composite materials, and particularly relates to an alkali-activated slag mortar mixed material and a preparation method thereof. The alkali-activated slag mortar mixed material comprises alkali-activated slag mortar and a mixture of rigid fibers and tetrasodium hydroxyethylidene diphosphonate. The rigid fibers have the effects of crack resistance, reinforcement and toughening, and are beneficial to improving the mechanical properties of the alkali-activated slag mortar. Meanwhile, the tetrasodium hydroxyethylidene diphosphonate can delay the setting time of the alkali-activated slag mortar and improve the flowing property and rheological property of the alkali-activated slag mortar, and the improvement of the rheological property can further improve the distribution and orientation of the rigid fibers in the alkali-activated slag mortar, so that the promotion effect of the rigid fibers is better exerted. Therefore, the alkali-activated slag mortar mixed material provided by the invention has good working performance and mechanical properties, can meet the requirements of actual construction and the requirements on material strength, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of cement-based composite materials, and in particular relates to an alkali-activated slag mortar mixing material and a preparation method thereof. Background technique [0002] Slag is a waste residue discharged from the blast furnace when smelting pig iron, which has potential hydraulic activity. The material with gelling ability formed by slag under the excitation of alkali, that is, the alkali-activated slag gelling material. Alkali-activated slag cementitious material has the characteristics of high early strength, fast curing speed, corrosion resistance, high temperature resistance, etc., and compared with traditional Portland cement, its production cost is low, the process is simple, no firing is required, and energy consumption is low. It is a new type of green gel material with less harmful gas emission. However, the initial setting time of alkali-induced slag cementitious materials is too short, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/34
CPCC04B28/006C04B2111/00017C04B2111/343C04B2201/50C04B18/141C04B14/06C04B24/003C04B14/48C04B22/062C04B22/00
Inventor 龙武剑吴卓锐王晨宇韦经杰张轩翰董必钦邢锋
Owner SHENZHEN UNIV
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