CN102674760A

CN102674760A - Composition for manufacturing explosion-proof concrete

Info

Publication number: CN102674760A
Application number: CN2012101215270A
Authority: CN
Inventors: 张辉
Original assignee: Benxi Iron & Steel (group) Construction Co Ltd; Bengang Steel Plates Co Ltd
Current assignee: Benxi Iron & Steel (group) Construction Co Ltd; Bengang Steel Plates Co Ltd
Priority date: 2012-04-24
Filing date: 2012-04-24
Publication date: 2012-09-19

Abstract

The invention relates to a composition for manufacturing explosion-proof concrete, which comprises limestone, cement and a water reducing agent, wherein the mass content of iron sesquioxide in the limestone is less than 0.8 percent. The composition adopts the limestone as an aggregate, the limestone is low in cost, and the content of the iron sesquioxide is 0.3-0.5 percent generally. Therefore, the composition has the beneficial effects that even if the concrete is strongly collided by an object and has a larger friction with mechanical equipment, no spark can be generated, so that the explosion-proof effect is realized; and the manufacturing cost is very low.

Description

Make the compsn of antiexplosive concrete

Technical field

The present invention relates to a kind of compsn of making antiexplosive concrete.

Background technology

Antiexplosive concrete is meant the special concrete that impacts and under the mechanical friction effect, do not produce spark with its structures of building by laying bricks or stones through object collision; This kind concrete is widely used in process of conveying inflammable, explosive energy medium pipeline foundation and workshop terrace; Deposit the concrete floor in explosives, inflammable items warehouse; The inflammable gas environment, flammable blast dust atmosphere, and field such as metope of petrochemical industry explosion-proof area, ground.In existing technology, the compsn of making antiexplosive concrete adopts CaCO usually ₃For sedimentogeneous rocks such as the rhombspar of staple, marble are aggregate, adopt cement as consolidating material, be added with materials such as water reducer, hardening accelerator, retardant, frostproofer, adulterant at present.Though this kind antiexplosive concrete is at the mutual collision impact of object with at the difficult spark that produces of the situation of mechanical friction; But because sedimentogeneous rock resource-constraineds such as rhombspar and marbles, price is higher relatively, so; Adopt rhombspar and marble etc. to make the aggregate of antiexplosive concrete; Can improve concrete cost on the one hand, because of rhombspar and marmorean resource-constrained, be difficult for a large amount of promoting the use of on the other hand.

The name of Chinese patent 100593593C Granted publication is called " porous polypropylene modified fiber that is used for antiexplosive concrete " and provides a kind of technical scheme that prevents the concrete explosion.The polypropylene chip that this patent employing melting index is 16-60 is a body material; Add hard fatty acids acidamide surfactant and inorganic ceramic micro mist; With its blend or again after the granulation, adopt the method for high-pressure spinning and multistage stretching, be spun into high-strength Vestolen PP 7052 vesicular long filament; With being used for concrete or mortar after the long filament cutting, to increase concrete explosion performance.But because this patent is not noticed iron-holder in the concrete; If concrete contains more red oxide of iron; Can not prevent that spark from producing even if add some differential fibers toward concrete; Higher relatively because of the cost of manufacture and the raw materials cost of polypropylene fibre simultaneously, thus concrete cost can be increased greatly.

Summary of the invention

The purpose of this invention is to provide the low iron of a kind of utilization cheaply material as aggregate, the compsn that the making antiexplosive concrete of problem such as high and inadequate resource is used with workout cost.

The compsn of making antiexplosive concrete proposed by the invention comprises the material of following mass percent: Wingdale 70-80%, and cement 15-25%, water reducer 2-5%, wherein, the mass content of red oxide of iron is less than 0.8% in the Wingdale.If the content of red oxide of iron is less than 0.8% in the Wingdale, with its formed structures of concrete of making as aggregate, even if receive the strong bump of object and mechanical friction can not produce spark yet; And if the content of red oxide of iron can reduce the content of red oxide of iron through the mode of magnetic separation greater than 0.8% in the Wingdale; If the content of Wingdale is lower than 70% in the concrete, concrete viscosity is increased, be not suitable for pumping, and cost can improve; If the content of Wingdale is higher than 80% in the concrete, concrete viscosity is not enough, influences the intensity of structures.

Coarse grained particle diameter is the 60-70% that 5-20mm accounts for total mass in the said Wingdale, and the fine particle below the 5mm accounts for the 30-40% of total mass.Fine particle is to account for more than 40% of total mass below the 5mm in the Wingdale, can influence the construction quality of antiexplosive concrete.

Ferric oxide content accounts for the 0.3-0.5% of total mass in the said Wingdale.

Also be added with the flyash that the quality share is 5-10% in the said compsn.Antiexplosive concrete if adopt the mode of pumping to build structures by laying bricks or stones, adds an amount of flyash and can reduce concrete viscosity, thereby make things convenient for pumping in construction process.

The compsn of making antiexplosive concrete proposed by the invention adopts Wingdale as aggregate; And Wingdale not only cost is low; And the content of red oxide of iron is generally at 0.3-0.5%, so, even this kind concrete receive the strong bump of object and and mechanical means between have bigger frictional force also can not produce spark; Can realize explosion-proofly, and cost of manufacture is very low.

Embodiment

Embodiment 1

Produce the concrete composition of 1000Kg, get the limestone powder of 700Kg, cement 250Kg, water reducer 50Kg is antiexplosive concrete with adding the water stirring after three kinds of mixing of materials.Wherein, particle diameter is that the Wingdale of 5-20mm can adopt 420Kg, and particle diameter is the employing 280Kg below the 5mm.

Embodiment 2

Produce the concrete composition of 1000Kg, get the limestone powder of 800Kg, cement 150Kg, water reducer 50Kg is antiexplosive concrete with adding the water stirring after three kinds of mixing of materials.Wherein, particle diameter is that the Wingdale of 5-20mm can adopt 640Kg, and particle diameter is the employing 160Kg below the 5mm.

Embodiment 3

Produce the concrete composition of 1000Kg, get the limestone powder of 750Kg, cement 230Kg, water reducer 20Kg is antiexplosive concrete with adding the water stirring after three kinds of mixing of materials.Wherein, particle diameter is that the Wingdale of 5-20mm can adopt 450Kg, and particle diameter is the employing 300Kg below the 5mm.

In embodiment 1-3, the mass content of red oxide of iron is less than 0.8% in the Wingdale, and optimum content is 0.3-0.5%.If the antiexplosive concrete that constitutes with said composition adopts the mode of pumping to build buildings or structures by laying bricks or stones, can in compsn, also add the flyash that the quality share is the 5-10% of compsn total mass, to reduce concrete viscosity, make things convenient for pumping.

Claims

1. make the compsn of antiexplosive concrete, it is characterized in that: said composition comprises the material of following mass percent: Wingdale 70-80%, and cement 15-25%, water reducer 2-5%, wherein, the mass content of red oxide of iron is less than 0.8% in the Wingdale.

2. compsn according to claim 1 is characterized in that: coarse grained particle diameter is the 60-70% that 5-20mm accounts for total mass in the said Wingdale, and the fine particle below the 5mm accounts for the 30-40% of total mass.

3. compsn according to claim 1 is characterized in that: ferric oxide content accounts for the 0.3-0.5% of total mass in the said Wingdale.

4. according to claim 1 or 2 or 3 described compsns, it is characterized in that: also be added with the flyash that the quality share is 5-10% in the said compsn.