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Efficient soundless cracking agent and production method thereof

A silent crushing agent and high-efficiency technology, applied in the field of expansion agent materials, can solve the problems of long crushing time, affecting work progress, fast hydration reaction, etc., achieving sufficient grouting time and preventing spray holes.

Active Publication Date: 2020-03-17
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (3) The working efficiency of many silent crushing agents is low, which is manifested in the early hydration reaction of some crushing agents, the temperature rises too fast, the formation of stones is low in strength, and the phenomenon of spray holes is prone to occur, or although the expansion stress can reach a relatively high level when crushing High absolute value, but the crushing time is too long, affecting the work progress

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Expanded clinker: take limestone: 89%, iron powder: 3%, gypsum: 8% to grind raw meal, CaO in limestone is 51%, iron powder Fe 2 o 3 65.0%, gypsum SO 3 45.0%, calcined at 1350°C in a decomposition kiln outside the kiln to obtain expanded clinker. Quantitative analysis of its mineral composition is fCaO: 55%, C 2 S: 22%, C 4 AF+C 2 F: 13%, CaSO 4 : 10%.

[0028] Sulphoaluminate cement clinker: C 4 A 3 : 70%, C 2 S: 20%, C 4 AF: 10%.

[0029] Retarder: boric acid, citric acid.

[0030] Water reducer: Naphthalene based water reducer.

[0031] Grind 90 parts of expansion clinker and 10 parts of sulphoaluminate cement clinker to a fineness of 150m through a ball mill 2 / kg, and then mixed with naphthalene-based water reducer, the dosage is 0.7 parts, 0.2 parts of boric acid, 0.2 parts of citric acid, and then mixed to obtain the crushing agent product. Use this crushing agent to produce SCA-I type, and test it according to JC506-2008 Appendix A method. The expan...

Embodiment 2

[0033] Expanded clinker: take limestone: 92%, iron powder: 3%, gypsum: 5% to grind raw meal, CaO in limestone is 54.0%, iron powder Fe 2 o 3 68%, gypsum SO 3 48.0%, calcined at 1300°C in a decomposition kiln outside the kiln to obtain expanded clinker. The 3-30 mm grains in the expanded clinker accounted for about 50% of the total, and the vertical weight was 1300g / L. Quantitative analysis by diffraction Its mineral composition is fCaO: 67%, C 2 S: 8.0%, C 4 AF+C 2 F: 18.0%, CaSO 4 : 7.0%

[0034] Sulphoaluminate cement clinker: C 4 A 3 : 50%, C 2 S: 35%, C 4 AF: 15%.

[0035] Retarders: boric acid and sodium gluconate.

[0036] Water reducer: solid polycarboxylate water reducer.

[0037] Grind 85 parts of expansion clinker and 15 parts of sulphoaluminate cement clinker to a fineness of 210m 2 / kg, and then mixed with solid polycarboxylate superplasticizer, the dosage is 0.1 part, 0.2 part of boric acid and 0.2 part of sodium gluconate are mixed to obtain the cr...

Embodiment 3

[0039] Expanded clinker: take limestone: 94%, iron powder: 1.8%, gypsum: 4.2% to grind raw meal, CaO in limestone is 54.0%, iron powder Fe 2 o 3 68.3%, gypsum SO 3 It is 52.4%, calcined at 1260°C in the decomposition kiln outside the kiln, and the expanded clinker is obtained. The 3-30 mm grains in the expanded clinker account for about 30-50% of the total amount, and the vertical weight is 1200g / L. Quantitative analysis of its mineral composition is fCaO: 75%, C 2 S: 8.0%, C 4 AF+C 2 F: 10.0%, CaSO 4 : 7%.

[0040] Sulphoaluminate cement clinker: C 4 A 3 : 60%, C 2 S: 32%, C 4 AF: 18%.

[0041] Retarders: boric acid and sodium gluconate.

[0042] Water reducer: Naphthalene based water reducer.

[0043] Grind 86 parts of expansion clinker and 14 parts of sulphoaluminate cement clinker to a fineness of 280m through a ball mill 2 / kg, mixed with naphthalene-based water reducer, the dosage is 0.5 parts, 0.1 part of boric acid and 0.1 part of sodium gluconate are mi...

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Abstract

The invention discloses an efficient soundless cracking agent and a production method thereof. The cracking agent product is prepared from the following mineral components by weight percentage: 55-75%of fCaO, 8-22% of C2S, 10-20% of C4AF+C2F, 5-10% of CaSO4, 85-95 parts of an expansion clinker, 5-15 parts of a sulphoaluminate cement clinker, 0.1-0.4 part of a retarder, and 0.1-0.7 part of a waterreducing agent. The invention solves the problem of low working efficiency of existing product, i.e. the cracking agent is fast in early hydration reaction and the temperature rise is fast, the stonestrength is low, spray holes are easily generated, or slow increase of expansion stress causes long crushing time and the like, by adjusting mineral components of the expansion clinker, the calcination temperature is lowered, the efficient soundless cracking agent has the characteristics of reduction of clinker heat consumption, reduction of the emission of nitric oxide, sulfur oxide, CO2 and thelike, and is beneficial to environmental protection.

Description

technical field [0001] The invention belongs to the field of expansion agent materials, in particular, it is a high-efficiency silent breaker and a production method thereof. Background technique [0002] Silent breaking agent is also called static breaking agent, static expansion cracking agent, etc. It uses high-expandability powdery gelling material, mixes water to form a slurry, pours it into the broken hole of the broken brittle object, and uses its hydration A material that is broken by the high expansion stress generated by volume expansion and cracked. Because of its safety, reliability, cheap price, precise cutting and crushing, no vibration and noise, flying stones and no harmful gas, it makes up for the shortage of explosives and is widely researched and used. [0003] At present, there are many kinds of silent breakers on the market, and the quality is uneven. Silent breakers are roughly divided into two types: hybrid type and sintered type. The mixed type is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2103/22C04B2103/302C04B7/00
Inventor 喻庆华付亚敏种娜陈雪梅张凌志
Owner JIAHUA SPECIAL CEMENT
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