Alkali-activated slag cement efflorescence inhibitor and preparation method thereof

A technology of alkali slag cement and pan-alkali inhibitor, which is applied in the field of building materials, can solve the problems of quality accidents, prolong the delivery time, rework, etc., and achieve the effects of low cost of use, improvement of project quality, and reduction of amplitude.

Inactive Publication Date: 2017-09-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will even cause a series of problems such as quality accidents, extended delivery time, and rework.

Method used

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  • Alkali-activated slag cement efflorescence inhibitor and preparation method thereof
  • Alkali-activated slag cement efflorescence inhibitor and preparation method thereof
  • Alkali-activated slag cement efflorescence inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 10kg of 5A zeolite, 20kg of silica fume, 25kg of high-calcium fly ash, 35kg of ultrafine slag powder, and 10kg of industrial grade boric acid, and fully mix the above raw materials in a mixer for 10 hours to ensure that they are fully mixed. The material was ground in a ball mill for 8 hours, and its specific surface area was determined to be 550m 2 / kg, the ubiquitin inhibitor was obtained. as attached figure 1 As shown, with the increase of the amount of efflorescence inhibitor in Example 1, the strength of alkali slag cement showed a trend of first increasing and then decreasing. The optimal dosage of ubiquitine inhibitor was 10.0%, and the compressive strength was increased compared with that without ubiquitine inhibitor.

Embodiment 2

[0032] Weigh 15kg of 5A zeolite, 20kg of silica fume, 20kg of fly ash, 40kg of superfine slag powder, and 5kg of industrial-grade boric acid, and fully mix the above raw materials in a mixer for 10 hours to ensure that they are fully mixed. Grind in a ball mill for 7 hours, and measure its specific surface area to be 520m 2 / kg, the ubiquitin inhibitor was obtained. From attached figure 2 It can be seen that after adding the efflorescence inhibitor, the concentration of carbonate ions (ie, the main component of efflorescence) in the surface layer of the hardened slurry of alkali slag cement dropped sharply, from 2500 mg / L to 1100 mg / L, effectively inhibiting the efflorescence phenomenon of alkali slag cement . From attached image 3 It can be seen that after adding the pan-alkaline inhibitor, the pH value of the alkali slag hardened slurry is significantly reduced, but it still maintains an alkaline environment above 11.0. Therefore, the pan-alkaline inhibitor can adjust t...

Embodiment 3

[0034] Weigh 20kg of 5A zeolite, 20kg of silica fume, 20kg of high-calcium fly ash, 25kg of ultrafine slag powder, and 15kg of industrial grade boric acid, and fully mix the above raw materials in a mixer for 12 hours to ensure that they are fully mixed. The material was ground in a ball mill for 9 hours, and its specific surface area was determined to be 580m 2 / kg, the ubiquitin inhibitor was obtained. From attached Figure 4 It can be seen that the pore size of the alkali slag cement hardened slurry decreases from harmful pores greater than 0.02um to harmless pores less than 0.02um after adding the tripubtine inhibitor of the example. It reduces the probability of efflorescence caused by alkali ions passing through the open channel with the increase of water, thereby inhibiting the efflorescence phenomenon of alkali slag cement. From attached Figure 5 It can be seen that the water absorption of the alkali slag cement hardened slurry after adding the efflorescence inhibi...

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Abstract

The invention relates to the technical field of building materials, in particular to an inhibitor capable of inhibiting efflorescence of alkali-activated slag cement and adjusting the performance of the alkali-activated slag cement, and a preparation method of the inhibitor. The alkali-activated slag cement efflorescence inhibitor is characterized by being prepared from the following raw materials by mass percent: 10-30% of zeolite, 10-20% of silica fume, 20-30% of pulverized fuel ash, 5-15% of boric acid and 5-55% of superfine slag powder. The alkali-activated slag cement efflorescence inhibitor provided by the invention is simple to prepare and use, and has a certain retarding effect; after the efflorescence inhibitor is added into alkali-activated slag cement concrete and mortar, the working performance of the alkali-activated slag cement concrete and mortar can be improved, the engineering quality is improved after construction, the early strength and later strength of the alkali-activated slag cement concrete can be increased by 15-20%, the efflorescence probability of the alkali-activated slag cement concrete is greatly reduced, and the reduction magnitude reaches up to 80%; the alkali-activated slag cement efflorescence inhibitor can inhibit the efflorescence phenomenon of the alkali-activated slag cement after construction, and has an inhibiting effect on the efflorescence phenomenon of the building materials after construction.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an inhibitor capable of inhibiting the efflorescence of alkali slag cement and regulating the performance of alkali slag cement and a preparation method thereof. Background technique [0002] Building materials are the most widely used class of materials. At present, the application process of traditional building materials follows the pattern of development-application-abandonment, which leads to the depletion of resources, and causes a large amount of waste materials, pollutant discharge and environmental degradation. For every ton of steel produced, tens of tons of steel slag, slag and other waste slag will be produced. The discharge of solid waste occupies land, pollutes the environment, endangers human health, and also causes a huge waste of resources. How to reduce the consumption of non-renewable resources, make full use of industrial waste, and turn waste int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/00
CPCC04B40/0039C04B14/047C04B18/146C04B18/08C04B18/141C04B22/0013
Inventor 周宗辉王金邦程新杜鹏李芳淑
Owner UNIV OF JINAN
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