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Activated basalt powder used as cement admixture and preparation method thereof

A technology of basalt powder and mixed material, which is applied in the field of building materials, can solve the problems of high grinding cost, high power consumption and poor grindability, etc., and achieves the effect of increasing the content of fine powder, excellent product performance and improving mechanical properties.

Inactive Publication Date: 2012-06-20
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide range of types and sources of volcanic ash materials, their chemical composition varies greatly. There are large differences in chemical quality, mineral composition, particle group distribution and harmful impurity content of volcanic ash materials of different varieties and origins. brought great difficulty
Emeishan basalt has high hardness, large grinding power consumption, poor grindability, and high grinding cost, making it difficult to popularize and apply it in the cement and concrete industry.

Method used

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  • Activated basalt powder used as cement admixture and preparation method thereof
  • Activated basalt powder used as cement admixture and preparation method thereof
  • Activated basalt powder used as cement admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw material of Emeishan basalt is crushed repeatedly step by step with a jaw crusher until the maximum particle size is ≤3.15mm; the experimental ball mill is used for grinding for 60 minutes; ). Prepare and maintain according to GB / T 17671-1999 "Cement Mortar Strength Test Method", and take out the test block at the corresponding age to measure the strength of cement mortar. 23% equivalent replacement of cement clinker, initial setting 105min, final setting 158min, the stability is qualified, the compressive / flexural strength of activated basalt mortar 3d, 7d and 28d are 24.1 / 5.3, 34.5 / 5.7, 43.2 / 6.9 respectively. It fully complies with the strength requirements of pozzolanic Portland cement 42.5R in GB175-2007 "General Portland Cement".

Embodiment 2

[0032]The raw material of Emeishan basalt is crushed repeatedly step by step with a jaw crusher until the maximum particle size is ≤3.15mm; the experimental ball mill is used for grinding for 50 minutes; ). Prepare and maintain according to GB / T 17671-1999 "Cement Mortar Strength Test Method", and take out the test block at the corresponding age to measure the strength of cement mortar. 30% equivalent replacement of cement clinker, initial setting 115min, final setting 165min, the stability is qualified, the compressive / flexural strength of activated basalt mortar 3d, 7d and 28d are 19.3 / 4.2, 27.5 / 5.5, 36.2 / 6.6 respectively. It fully complies with the strength requirements of pozzolanic Portland cement 32.5R in GB175-2007 "General Portland Cement".

Embodiment 3

[0034] The raw material of Mount Emei basalt was crushed repeatedly step by step with a jaw crusher until the maximum particle size was ≤3.85mm; the ball mill was used for grinding for 65 minutes, and the grinding aid was added in three times during the grinding process. That is, 0.15% of the raw material of Emeishan basalt); to obtain the finished product (fineness 80μm sieve allowance ≤ 3%). Prepare and maintain according to GB / T 17671-1999 "Cement Mortar Strength Test Method", and take out the test block at the corresponding age to measure the strength of cement mortar. 25% equivalent replacement of cement clinker, initial setting 97min, final setting 123min, the stability is qualified, the strength of activated basalt mortar 3d, 7d and 28d are 20.5 / 4.5, 30.1 / 5.9, 39.5 / 7.1 respectively. It fully complies with the strength requirements of pozzolanic Portland cement 32.5R in GB175-2007 "General Portland Cement";

[0035] The grinding aid is composed of 70% to 80% of polyol, ...

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Abstract

The invention discloses activated basalt powder used as a cement admixture. The activated basalt powder is characterized in that the activated basalt powder is mainly composed of basalt powder with weight of screen residue with fineness being 80 mu m not more than 0.5 and specific surface area of 380-600 m<2> / kg, and a grinding aid accounting for 0.15-1wt% of the basalt powder can also be added, wherein the grinding aid comprises the following raw material components in percentage by mass: 70-80% of polyol, 10-20% of triethanolamine, 1.5-2.6% of inorganic salt sodium sulfate, and 7-10% of organic salt sodium lignosulfonate. The activated basalt powder is prepared by mechanical activation and chemical activation, mechanical activation or chemical activation, mechanical activation and other modes. Used as the cement admixture, the prepared product can improve cement performances, adjust cement grade and lower cement production cost; and used as a concrete admixture, the prepared product can lower product cost of unit-volume concrete, improve the mechanical performances and durability of concrete.

Description

technical field [0001] The invention belongs to building materials, and relates to an activated basalt powder used as a cement mixture and a preparation method thereof. The activated basalt powder of the invention is particularly suitable for use as cement mixture and concrete admixture. Background technique [0002] At present, the mixed materials and admixtures used in the building materials industry are mainly industrial waste residues such as slag and fly ash. Blast furnace slag and fly ash account for the largest proportion of cement admixtures in my country, and the combination of the two accounts for 44.65% of the amount of cement admixtures in my country. In recent years, the rapid development of my country's infrastructure has led to the rapid expansion of the cement and concrete industry, resulting in very tight demand for fly ash, slag and other mixed materials and admixtures that were originally used as waste slag. Among them, the excellent performance of blast ...

Claims

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Application Information

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IPC IPC(8): C04B7/02C04B14/04B02C21/00
Inventor 刘来宝唐凯靖赵冬梅许晓英王燕
Owner SOUTHWEAT UNIV OF SCI & TECH
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