CN101172799A

CN101172799A - Natural activity volcanic ash concrete blunging material and application thereof

Info

Publication number: CN101172799A
Application number: CNA2007100662740A
Authority: CN
Inventors: 张仲
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-10-15
Filing date: 2007-10-15
Publication date: 2008-05-07

Abstract

The invention relates to a natural active volcano ash concrete admixture and the application method thereof. The invention adopts one or two of natural andesite, andesitic basalt, tuff, zeolite and pumice erupted the volcanos in TengChong County and LongLing County of YunNan province. The application method comprises the steps as follows: high thin powder grinding to the volcano ash super thin mineral admixture with the thickness of 45 microns is carried out, the residue on sieve is not more than 15 percent, the specific surface area is 450m2/kg to 550m2/kg, the water content is not more than 1 percent, the water needing rate is less than 105 percent and the anti-press intensity of the cement glue sand in 28 days is not less than 65 percent. The invention can partly substitute cement in water and electricity project large dam concrete, the building project concrete and the mortar. The invention is used for building project and varies according to the stage of the type of the power station and the concrete, choosing from 15 to 60 percent of the mixing range, 15 to 30 percent for building project and 40 to 50 percent for building mortar and plasterer mortar. The invention effectively solves the technical problems that the large-volume concrete of setting heat in construction process causes the crete craze. The invention saves the cement dosage, reduces the transportation resource and cost, and reduces the project cost.

Description

A kind of volcano grey matter concrete admixture and application of natural radioactivity

Technical field:

The present invention relates to material of construction and concrete mineral admixture, especially a kind of volcano grey matter concrete admixture and application of natural radioactivity.

Background technology:

In hydroelectric project dam, factory building, tunnel and house construction engineering concrete, mix an amount of adulterant, have the concrete degree of compactness of increasing, improve workability of concrete and weather resistance, reduce the hydration heat of concrete temperature rise, opposing concrete shrinkage crackle, suppress alkali-aggregate reaction, save cement, effect such as reduce cost.Thereby big-and-middle-sized Hydraulic and Hydro-Power Engineering is generally used adulterant, also begins to promote the utilisation technology of concrete mineral admixture in urban construction with good conditionsi.Domestic concrete admixture kind relatively more commonly used has flyash, slag powders etc.; and corresponding technical standard arranged, and as: GB/T1596 " flyash that is used for cement and concrete ", GB/T18046 " GBFS that is used for cement and concrete ".But at the large medium-size station and the city construction engineering that lack industrial residue resource such as flyash, slag powders or build away from these resource places of production, do concrete admixture if still select these materials for use, then do not meet the construction select materials and must follow the fundamental principle of selection nearby, and lost its feasibility and economy of using as concrete admixture.

Summary of the invention:

The objective of the invention is to propose a kind of volcano grey matter concrete admixture and application of natural radioactivity, utilize in natural andesite, andesite basalt, tuff, zeolite and the float stone that Tengchong County, Yunnan Province and Longling County volcanic eruption go out one or more compound, mineralogical composition is to be rich in SiO ₂, Al ₂O ₃Activeconstituents is main, through fine-grinding to fineness 45um tail over≤15%, specific surface area 450m ²/ kg-550m ²The volcanic ash superfine active mineral admixture of/kg, water ratio≤1%, water demand ratio＜105%, 28 days compressive strength rate 〉=65% of cement mortar.Use in hydroelectric project dam concrete and house construction engineering concrete and mortar to replace part cement, it is different and different with concrete grade with the power station dam type to be used for its volume of hydroelectric project, and the volume scope is to select between the 15%-60%; Be used for its volume of house construction engineering and be generally 15%-30%; Be used for its volume of masonry mortar and motar and be generally 40%-50%.The present invention can effectively solve mass concrete and produce a large amount of hydration heat in construction process, causes the technical problem of concrete cracking, can also gather materials on the spot, and saves cement consumption, saves social transport resource and cost, and accelerating construction progress reduces construction costs.

Advantage of the present invention and positively effect: not only can effectively solve the hydroelectric project mass concrete and in construction process, produce a large amount of hydration heat, the technical problem that causes concrete cracking, and help controlling thermal insulation warming, reduce concrete shrinkage, improve the anti-seismic performance and the weather resistance of dam concrete, in like manner, in house construction engineering, use effectively raising workability of concrete and weather resistance.Can also gather materials on the spot, cement consumption is saved in processing on the spot; The residue resource that can utilize local processing volcanic ash stone material to produce is in a large number produced high property mineral admixture, turns waste into wealth, and has good environmental effect; Avoid link and expenses such as logistics that long-distance transportation flyash produces, storage, save social transport resource, ensure and convenient for accelerating construction progress provides, thereby reduce construction costs.

Embodiment:

Natural volcanic ash crushing raw ore granulating goes out impurity through screening and separating, dry to moisture less than 2% (dry season can be omitted this program); The quality index of carrying paramount thin ball mill grinding to technological standard to require, that is: the finish fineness 45um of volcanic ash superfine active mineral admixture tail over≤15%, specific surface area 450m ²/ kg-550m ²/ kg, water ratio≤1%, water demand ratio＜105%, 28 days compressive strength rate 〉=65% of cement mortar, SO ₃≤ 3.5%, loss on ignition≤8%; Obtain natural volcanic ash matter concrete admixture finished product through powder separating machine and fly-ash separator collection, check, warehouse-in, homogenizing is in order to dispersing and packing.

The volcano grey matter concrete admixture of described natural radioactivity, be used for concrete and mortar and replace part cement, its volume is different and different with concrete grade with the power station dam type in hydroelectric project is used, the volume scope is to select between 15%～60%, maximum cement replacement amount is 65%, and replacement amount commonly used is about 30%; In the house construction engineering concrete, use the ratio that replaces cement and be generally 15%～30%; In masonry mortar and motar, use the ratio that replaces cement and be generally 40%～50%.

Claims

1. the volcano grey matter concrete admixture of a natural radioactivity, it is characterized in that: utilize in natural andesite, andesite basalt, tuff, zeolite and the float stone that Tengchong County, Yunnan Province and Longling County volcanic eruption go out one or more compound, mineralogical composition is to be rich in SiO ₂, Al ₂O ₃Activeconstituents is main, processes the volcanic ash superfine active mineral admixture that obtains through fine-grinding.

2. according to the volcano grey matter concrete admixture of the natural radioactivity of claim 1, it is characterized in that: its physicals of described active mineral admixture is: finish fineness 45um tails over≤and 15%, specific surface area 450m ²/ kg-550m ²/ kg, water ratio≤1%, water demand ratio＜105%, 28 days compressive strength rate 〉=65% of cement mortar, SO ₃≤ 3.5%, loss on ignition≤8%.

3. the application of the volcano grey matter concrete admixture of a natural radioactivity according to claim 1, it is characterized in that: natural volcanic ash matter concrete admixture is used for concrete and mortar replaces part cement, its volume is different and different with concrete grade with the power station dam type in hydroelectric project is used, the volume scope is to select between the 15%-60%, maximum cement replacement amount can reach 65%, and replacement amount commonly used is about 30%; In the house construction engineering concrete, use the ratio that replaces cement and be generally 15%-30%; In masonry mortar and motar, use the ratio that replaces cement and be generally 40%-50%.