CN103193413A

CN103193413A - Concrete anti-seismic impact-resistant anti-cracking agent

Info

Publication number: CN103193413A
Application number: CN2013101365770A
Authority: CN
Inventors: 李群芳; 罗建成; 李赫男; 朱振环; 李广宙
Original assignee: SHANGHAI WUGUAN NEW MATERIAL CO Ltd
Current assignee: SHANGHAI WUGUAN NEW MATERIAL CO Ltd
Priority date: 2013-04-19
Filing date: 2013-04-19
Publication date: 2013-07-10

Abstract

The invention discloses concrete anti-seismic impact-resistant anti-cracking agent. The anti-cracking agent is a mixture of the following materials in parts by weight: 13-17 parts of industrial aluminum sulfate, 2-5 parts of high-strength imitated steel wire fiber, 0.1-0.4 part of lauryl sodium sulfate, 7-13 parts of silica fume, 34.5-45 parts of anhydrite, 23-30 parts of sulfoaluminate clinker and 3-7 parts of active excitant; during a concrete preparation process, the weight of cementing material doped in the concrete is 6%-8%, so that the shrinkage of the concrete is compensated at a plastic stage and each stage after the hardening stage, and therefore, the anti-bending anti-folding capacity of the concrete can be increased, the anti-seismic impact-resistant performances and anti-cracking seepage-proofing performances of the concrete are improved and the durability of the structure is greatly strengthened.

Description

Concrete anti-knock shock resistance anti-fissuring agent

Technical field

The present invention relates to a kind of anti-fissuring agent, relate in particular to a kind of concrete anti-knock shock resistance anti-fissuring agent.

Background technology

Along with speeding up of Chinese Urbanization construction, the development of urban construction and the increase of the density of population, earthquake becomes increasing to the mankind's harm, carries out the buildings project of damage and has very important realistic meaning.

Earthquake is inevitably as a kind of spontaneous phenomenon, and according to statistics, 2007 ~ 2009 years, the earthquake that the whole world takes place more than 7.0 grades reached 54 times more than, and wherein earthquake has just accounted for 35% more than 7.5 grades, causes direct economic loss to reach the over ten billion dollar.China is vast in territory, builds in the city of seismic zone, earthquake-prone region countless.Sichuan in 2008 Wenchuan violent earthquake, Qinghai cajaput violent earthquake in 2010, its destructive force allows the people remember clearly so far.Horizontal and the vertical seismic wave that earthquake produces makes concrete structure cracking occur, thereby causes structural damage beating property of concrete structure and the extruding of swing property.Therefore concrete structure durability research is more and more paid attention to by experts and scholars, and concrete anti-knock shock resistance ability is also quite paid close attention to as an important research project in the endurance performance of concrete.

Present domestic related specifications and the standard of still not having concrete anti-knock shock resistance aspect, so do not keep the additive product of concrete anti-knock shock resistance and so on the market yet.And engineering circle is also just taked various ways to control or is reduced this moving load to concrete destruction, for example " strong column and weak beam ", " strong shear capacity and weak bending capacity ", the measure of increase anti-seismic structure etc.But these ways all be difficult to guarantee concrete does not ftracture under dynamic load effect or with Crack Control in harmless scope, can not effectively solve concrete at the cracking phenomena of receiving under the dynamic load effect.

Summary of the invention

Purpose of the present invention is at the deficiency of like product in the market and improve a kind of concrete anti-knock shock resistance anti-fissuring agent of development, make it can strengthen concrete member in use and produce crack resistance under the horizontal and vertical ground seismic wave function in earthquake, reduce seismic wave to beating property of concrete structure and swing property extruding injury, and then guarantee the weather resistance of buildings.

Concrete anti-knock shock resistance anti-fissuring agent, described anti-fissuring agent is formed by industrial aluminum sulphate, high-strength imitative steel wire fibre, sodium lauryl sulphate, silicon ash, anhydrite, sulfoaluminate clinker and activity excitant mixed preparing, it is characterized in that, described anti-fissuring agent preparation of raw material composition by weight is 13～17 parts industrial aluminum sulphate, 2～5 parts of high-strength imitative steel wire fibres, 0.1～0.4 part sodium lauryl sulphate, 7～13 parts silicon ash, 34.5～45 parts anhydrite, 23～30 parts sulfoaluminate clinker, 3～7 parts of activity excitants.

The industrial aluminum sulphate of 13～17 weight parts, the silicon ash of 7～13 weight parts, the anhydrite of 34.5～45 weight parts, the sulfoaluminate clinker of 23～30 weight parts, common grinding to specific surface area is 200～300m ²/ Kg adds 0.1～0.4 part sodium lauryl sulphate, 2～5 parts of high-strength imitative steel wire fibres and 3～7 portions of concrete admixtures that activity excitant is mixed and made into again.

Described anti-fissuring agent volume be in the concrete gelling material weight 6 ~ 8%, activity excitant is calcium hydroxide.High-strength imitative steel wire fibre is to be starting material with the polypropylene, forms through the ripple forming processes.

Its mechanism of action is the early stage moulding contraction that produces of industrial aluminum sulphate compensating concrete, avoid concrete to produce cracking in early days, sulfoaluminate clinker and anhydrite mainly play each stage shrinkage-compensating age of concrete, can compensating concrete the bigger contraction that produces in each length of time, farthest avoid concrete to produce the crack, what the reduction structure ftractureed because contraction produces may; The silicon ash can strengthen concrete density and wear resistance, promotes concrete wear resistance ability greatly, increases concrete toughness; High-strength imitative steel wire fibre relies on several fibers of nothing to form the early-age plastic crack that netted support system delays and stops concrete to produce owing to plastic shrinkage in concrete, and can play traction action at inside concrete, further increase concrete toughness; Sodium lauryl sulphate can be introduced the small stabilise bubbles that is evenly distributed in a large number in concrete, thereby increases substantially the elasticity of concrete.

Embodiment

1, concrete anti-knock shock resistance anti-fissuring agent part by weight is formed:

Industrial aluminum sulphate	The silicon ash	Sulfoaluminate clinker	Anhydrite	Sodium lauryl sulphate	High-strength imitative steel wire fibre	Activity excitant
							15	10	27	39.8	0.2	3	5

With 15 weight part industrial aluminum sulphates described above, 10 weight part silicon ashes, 39.8 weight part anhydrite and 27 weight part sulfoaluminate clinkers, common grinding to specific surface area is 200～300m ²/ Kg adds the sodium lauryl sulphate of 0.2 weight part again, and the high-strength imitative steel wire fibre of 3 weight parts and 5 weight part activity excitants are made concrete anti-knock shock resistance anti-fissuring agent.

Volume (accounting for gelling material gross weight ratio) in 6-8% during use directly mixes in the concrete, can make concrete produce early stage, mid-term and the late expansion of appropriateness through participating in hydration reaction, effectively drying shrinkage and the shrinkage in compensating concrete each length of time, to keep the volume stability in each length of time, improved concrete crack resistance greatly; A large amount of ore deposits of aquation formation simultaneously have the effect of filling the pore seam mutually makes pore attenuate, reduce, increased density, and high-strength imitative steel wire fibre relies on it not have several monfil to form netted support system delay and stop concrete because the early-age plastic crack that plastic shrinkage produces in concrete, and can play traction action in the concrete after sclerosis, significantly increase concrete toughness, thereby improve concrete anti-knock shock resistance performance, guaranteed the weather resistance of works.

2, concrete anti-knock shock resistance anti-fissuring agent performance index:

The performance index of table 1 concrete anti-knock shock resistance anti-fissuring agent

Table 2 is examined concrete performance index

Figure 2013101365770100002DEST_PATH_IMAGE002

Claims

1. concrete anti-knock shock resistance anti-fissuring agent, described anti-fissuring agent is formed by industrial aluminum sulphate, high-strength imitative steel wire fibre, sodium lauryl sulphate, silicon ash, anhydrite, sulfoaluminate clinker and activity excitant mixed preparing, it is characterized in that, described anti-fissuring agent preparation of raw material composition by weight is 13～17 parts industrial aluminum sulphate, 2～5 parts of high-strength imitative steel wire fibres, 0.1～0.4 part sodium lauryl sulphate, 7～13 parts silicon ash, 34.5～45 parts anhydrite, 23～30 parts sulfoaluminate clinker, 3～7 parts of activity excitants.

2. according to claims 1 described concrete anti-knock shock resistance anti-fissuring agent, it is characterized in that, described anti-fissuring agent volume be in the concrete gelling material weight 6 ~ 8%.

3. according to claims 1 described concrete anti-knock shock resistance anti-fissuring agent, it is characterized in that activity excitant is calcium hydroxide, high-strength imitative steel wire fibre is to be starting material with the polypropylene, forms through the ripple forming processes.

4. method of making each described anti-fissuring agent of claim 1-3, it is characterized in that, the sulfoaluminate clinker of the anhydrite of the silicon ash of the industrial aluminum sulphate of 13～17 weight parts, 7～13 weight parts, 34.5～45 weight parts and 23～30 weight parts, common grinding to specific surface area is 200～300m

/ Kg adds 0.1～0.4 part sodium lauryl sulphate again, and 2～5 parts of high-strength imitative steel wire fibres and 3～7 parts of activity excitants are mixed and made into anti-fissuring agent.