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Blast-furnace slag powder and blast-furnace slag and coal cinder compound powder excitant

A technology of blast furnace slag powder and blast furnace slag, which is applied in the field of activator, blast furnace slag powder or blast furnace slag and coal slag composite powder, which can solve the problems affecting the durability of concrete and steel bar corrosion, and achieve obvious excitation effect and cost reduction , cheap effect

Inactive Publication Date: 2009-06-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activator invented by this patent can improve the early strength of concrete, but it also has the disadvantages of the above-mentioned patent, the introduced Na 2 More O will affect the durability of concrete; what is more serious is that when the chloride ions introduced by adding calcium chloride and sodium chloride are used to configure reinforced concrete, it is easy to cause corrosion of steel bars, which greatly affects the durability of concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation of cement mortar is carried out according to the national standard GB / T 17671-1999.

[0021] Comparative sample: 225 grams of P.II 42.5 cement, 225 grams of blast furnace slag, 1350 grams of ISO standard sand, 225 grams of water, no activator added, and the compressive strength of the mortar after testing for 7 days and 28 days was 29.6MPa and 54.6MPa respectively According to the national standard GB / T 18046-2000, the activity index of slag powder is 78% and 103% in 7 days and 28 days respectively.

[0022] Test sample: 225 grams of P.II 42.5 cement, 225 grams of blast furnace slag, 1350 grams of ISO standard sand, 225 grams of water, 6.8625 grams of activator composed of 0.1125 grams of triethanolamine and 6.75 grams of calcined gypsum, tested for 7 days and 28 days The compressive strength of the mortar is 35.8MPa and 60.1MPa respectively, calculated according to the national standard GB / T 18046-2000, the 7-day and 28-day activity indices of the slag ...

Embodiment 2

[0025] The preparation of cement mortar is carried out according to the national standard GB / T 17671-1999.

[0026] Comparative sample: 225 grams of P II 42.5 cement, 225 grams of blast furnace slag, 1350 grams of ISO standard sand, 225 grams of water, no activator added, the compressive strength of the mortar after testing for 7 days and 28 days was 29.4MPa and 57.0MPa respectively, Calculated according to the national standard GB / T 18046-2000, the activity index of slag powder is 77% and 107% at 7 days and 28 days respectively.

[0027] Test sample: 225 grams of P.II 42.5 cement, 225 grams of blast furnace slag, 1350 grams of ISO standard sand, 225 grams of water, 6.8625 grams of activator composed of 0.1125 grams of triethanolamine and 6.75 grams of dihydrate gypsum, tested for 7 days and 28 days The compressive strength of natural rubber sand is 32.3MPa and 57.8MPa respectively. According to the national standard GB / T 18046-2000, the 7-day and 28-day activity indices of sl...

Embodiment 3

[0030] The preparation of cement mortar is carried out according to the national standard GB / T 17671-1999.

[0031] Comparative sample: 225 grams of P II 42.5 cement, 191.2 grams of blast furnace slag, 33.8 grams of coal cinder, 1350 grams of ISO standard sand, 225 grams of water, no activator added, and the compressive strength of the mortar after testing for 7 days and 28 days was 28.5 MPa respectively and 55.3MPa.

[0032] Test sample: 225 grams of P.II 42.5 cement, 191.2 grams of blast furnace slag, 33.8 grams of cinder, 1350 grams of ISO standard sand, 225 grams of water, 6.8625 grams of activator composed of 0.1125 grams of triethanolamine and 6.75 grams of calcined gypsum, tested 7 The compressive strengths of mortar sand at 1 day and 28 days were 31.2MPa and 58.3MPa, respectively.

[0033] Compared with the control sample, after adding this activator composed of triethanolamine and calcined gypsum, the potential activity of coal slag can be effectively stimulated; aft...

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Abstract

A trigger for stimulating the early-phase activity of the blast furnace slag powder or the mixture of blast furnace slag powder and cinder powder is proportionally prepared from triethanolamine and early strengthening agent (calcined gypsum or bihydrated gypsum or potassium chromium sulfate).

Description

technical field [0001] The invention relates to an activator in the field of building materials, in particular to an activator for blast furnace slag powder or composite powder of blast furnace slag and coal slag. The activator can be added during the production of mineral admixtures, and can also be added during the production of concrete. Background technique [0002] Blast furnace slag is an industrial waste slag produced in the process of ironmaking. The slag after water quenching and quenching contains a lot of vitreous body, showing an unstable state with high energy and high potential activity. After grinding, it becomes in line with the national standard GB / T18046- 2000 requirements for granulated blast furnace slag powder. Coal slag refers to the waste slag produced by coal-fired power plants, which is discharged from the bottom of the furnace and naturally cooled. Its structure exists in the form of stable crystals and its potential activity is low. With the rapi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B24/02C04B103/12
CPCC04B2103/10C04B40/0039
Inventor 文梓芸李顺
Owner SOUTH CHINA UNIV OF TECH
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