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Method for producing concrete blending material by using igneous rock

An igneous rock and concrete technology, applied in the field of building materials, can solve the problems of unsuitable concrete admixture, difficult to have market competitiveness, low quality coefficient, etc., and achieve the effects of dense concrete, low cost and wide source of raw materials

Inactive Publication Date: 2011-08-03
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are few reports on the use of igneous rock as a cement mixture. Due to its limited activity, the strength of cement made from it is low. After the implementation of the new cement standard, it is difficult to become competitive in the market.
In addition, due to its low quality coefficient and poor activity, it is not suitable to be directly used as an admixture of concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The weight percent of the raw material components of the igneous rock admixture is: 100% of igneous rock.

[0012] (1) Dry the igneous rock until the water content is less than 1%.

[0013] (2) Add 2% activator of igneous rock mass, that is, calcined gypsum, mix well, put it into a ball mill and grind until the specific surface area is 500m 2 / kg, that is, igneous rock admixture.

[0014] Calculated per cubic meter of concrete, cement 230kg, igneous rock admixture 80kg, water-cement ratio 0.56, sand ratio 0.45, FDN superplasticizer 3.2kg.

[0015] The configured concrete has a 3-day compressive strength of 14.7MPa, a 28-day compressive strength of 29Mpa, and a slump of 180mm.

Embodiment 2

[0017] The weight percent of the raw material components of the igneous rock admixture is: 50% of igneous rock and 50% of slag.

[0018] (1) Drying the igneous rock and the slag separately until the water content is less than 1%.

[0019] (2) Add igneous rock and slag total amount of 8% exciter namely quicklime, mix evenly, put into ball mill and grind until the specific surface area is 450m 2 / kg, that is, igneous rock admixture.

[0020] Calculated per cubic meter of concrete, cement 210kg, igneous rock admixture 100kg, water-cement ratio 0.56, sand ratio 0.45, FDN superplasticizer 2.67kg.

[0021] The configured concrete has a 3-day compressive strength of 15.5MPa, a 28-day compressive strength of 33.5MPa, and a slump of 200mm.

Embodiment 3

[0023] The weight percent of the raw material components of the igneous rock admixture is: 50% of igneous rock and 50% of fly ash.

[0024] (1) Dry the igneous rock until the water content is less than 1%.

[0025] (2) Add igneous rock and 5% of the total amount of fly ash as an activator, that is, calcined gypsum, mix well, put it into a ball mill and grind it until the specific surface area is 550m 2 / kg, that is, igneous rock admixture.

[0026] Calculated per cubic meter of concrete, cement 280kg, igneous rock admixture 80kg, water-cement ratio 0.47, sand ratio 0.42, FDN superplasticizer 2.30kg.

[0027] The configured concrete has a 3-day compressive strength of 20MPa, a 28-day compressive strength of 39.6Mpa, and a slump of 210mm.

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Abstract

The invention discloses a method preparing admixture of concrete by use of igneous rock. The specific procedures are that (1) the igneous rock, fly ash and slag are mixed by quality percent ratio of 50 to 100 percent, 0 to 50 percent and 0 to 50 percent; (2) active activator accounting for 0 to 15 percent (by mass percentage) of the sum of the igneous rock, fly ash and slag is added and uniformlymixed; the mixture is placed into a ball mill for milling; the active activator is one in calcium oxide, calcined gypsum, mirabilite and alum; the mixture is milled until reaching a specific surface area of 400 to 600m<2> / kg, thus obtaining the admixture of igneous rock for concrete. The invention is simple in production, wide in material source, low in cost, little in electricity consumption during milling, and applicable to industry, civil construction as well as underground and harbor projects.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for preparing concrete admixtures from igneous rocks. Background technique [0002] Igneous rocks, also known as igneous rocks, are called one of the three major rock types together with sedimentary rocks and metamorphic rocks. They are formed by the condensation of magma underground or ejected from the surface. The formation temperature of igneous rock is relatively high, generally between 700°C and 1500°C, and its oxygen content is as high as 46% by mass. Different types of igneous rocks vary greatly in composition, mainly composed of 12 types of minerals such as quartz, feldspar, pyroxene, amphibole, mica, olivine, nepheline, leucite and apatite. Mineral color according to SiO 2 +Al 2 o 3 Different from the relative content of FeO+MgO, SiO 2 +Al 2 o 3 More light color, FeO+MgO more dark. According to the degree of crystallization, igneous rocks are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B14/14C04B18/12C04B22/14
CPCC04B2103/10C04B2111/74C04B2111/00724C04B40/0039Y02W30/91C04B14/14C04B18/08C04B18/141C04B28/02C04B22/064C04B22/143C04B22/147C04B22/148
Inventor 陈平刘荣进贾韶辉马帅安庆锋李海东王一靓
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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