Sulphoaluminate cement and lime-based static blasting agent and preparation method thereof

A technology of sulfoaluminate cement and static blasting agent, which is applied in the field of mining, can solve the problems of long blasting period, affecting the construction process, and long expansion start time, and achieves low production cost, short production period and high expansion speed. Effect

Active Publication Date: 2021-12-07
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this leads to a long start time for the expansion of Portland cement and quicklime-based static blasting agents, so the blasting cycle is longer, which affects the construction process

Method used

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  • Sulphoaluminate cement and lime-based static blasting agent and preparation method thereof
  • Sulphoaluminate cement and lime-based static blasting agent and preparation method thereof

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preparation example Construction

[0040] The present invention also proposes a preparation method of sulphoaluminate cement and lime-based static blasting agent, such as Figure 1-2 As shown, the preparation method of the embodiment of the present invention includes the following steps: the first step is to add the water reducer, aluminum sulfate and sodium gluconate in proportion to the mixer and mix them evenly to obtain a composite admixture;

[0041] In the second step, the sulphoaluminate cement clinker, quicklime, gypsum and composite admixture are added in proportion to the mixer and mixed evenly to obtain the sulphoaluminate cement and lime-based static blasting agent (powder) .

[0042] In a preferred embodiment of the present invention, the preparation method further includes: a third step, adding water in proportion to the powder of the sulphoaluminate cement and lime-based static blasting agent prepared in the second step, Stir until smooth.

[0043] In a preferred embodiment of the present inven...

Embodiment 1

[0054] Sulphoaluminate cement and lime-based static blasting agent (powder) include: sulphoaluminate cement clinker 2500g, quicklime 6000g, gypsum 750g and composite admixture 750g (from the following water reducing agent, aluminum sulfate and sodium gluconate Take out 750g from the homogeneous mixture). Wherein, the compound additive is a mixture uniformly mixed according to the ratio of 7000g of water reducer, 2200g of aluminum sulfate and 800g of sodium gluconate.

[0055] Sulphoaluminate cement and lime-based static blasting agent (slurry) include: sulphoaluminate cement-based static blasting agent (powder) 10000g and water 4000g.

[0056] The preparation method of the sulphoaluminate cement of the present embodiment and lime-based static blasting agent comprises the following steps:

[0057] In the first step, add 7000g of water reducing agent, 2200g of aluminum sulfate, and 800g of sodium gluconate into the mixer and mix evenly. Refer to the test method of water reducin...

Embodiment 2

[0062] The difference with embodiment 1 is only: sulphoaluminate cement and lime-based static blasting agent (powder) comprise: sulphoaluminate cement clinker 2500g, unslaked lime 6000g, gypsum 750g and composite admixture 750g (from following subtraction Take out 750g in the homogeneous mixture of aqua, aluminum sulfate and sodium gluconate). Wherein, the compound additive is a mixture uniformly mixed according to the ratio of 6000g of water reducing agent, 2000g of aluminum sulfate and 800g of sodium gluconate.

[0063] Sulphoaluminate cement and lime-based static blasting agent powder (slurry): sulphoaluminate cement and lime-based static blasting agent (powder) 10000g and water 4000g.

[0064] It is detected that the expansion start time of the sulphoaluminate cement and lime-based static blasting agent is 7.5 minutes, and the axial expansion stress reaches 102.0 MPa.

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Abstract

The invention belongs to the technical field of mining, and particularly relates to a sulphoaluminate cement and lime-based static blasting agent and a preparation method thereof. The static blasting agent comprises sulphoaluminate cement clinker, quick lime, gypsum and a composite additive, the composite additive comprises a water reducing agent, aluminum sulfate and sodium gluconate; and the quick lime is obtained by normalizing and calcining. The sulphoaluminate cement and lime-based static blasting agent can obviously shorten the expansion starting time.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a sulphoaluminate cement and lime-based static blasting agent and a preparation method thereof. Background technique [0002] Blasting technology is needed in mining and building demolition. With the development of technology, static blasting is a development trend. At present, there are mainly two construction methods for static blasting, one is mechanized static blasting construction technology, and the other is static blasting agent construction technology. Among them, mechanized static blasting technology has the advantages of no vibration, no impact, no noise, no dust, etc., so it is more and more popular. In the prior art, Portland cement and quicklime are usually used to prepare static blasting agents. However, the static blasting agents may cause spray holes during use. In order to avoid the occurrence of nozzle holes, it is often necessary to overburn the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/00724C04B7/32C04B7/34C04B2103/302C04B22/148C04B24/10
Inventor 王雨利唐绘雨熊祖强张耀辉王成王春
Owner HENAN POLYTECHNIC UNIV
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