Multifunctional impervious microcrystal waterproof agent for concrete
Technical field
What the present invention relates to is a kind of concrete impervious water-proof material, specifically, relates to a kind of multifunctional impervious microcrystal waterproof agent for concrete.Belong to building material technical field.
Background technology
Concrete is as the widespread use in civil engineering work of a kind of main material of construction; but concrete material is because the characteristic of self structure; in use especially occur the seepage phenomenon for those underground and aouatic structure engineerings through regular meeting, this has had a strong impact on and has restricted the application of concrete material.Therefore, about the various additives that improve and improve the impervious ability of concrete material constantly are suggested, expand with inorganic water-proof agents such as the calcium chloride that improves the impervious ability of concrete anticracking, iron(ic) chloride by producing as early stage some, also have some organic classes in addition, as organosilicon, lipid acid etc.But waterproof ability is limited on the one hand for these water-resisting agents, can not be lasting, it is important reinforcing bars rusting in addition, so some novel more effective waterproof additive expectations are developed and use to concrete structure inside.Wherein be typically a kind of cement penetrant crystalline water-proof material the most.
Find through literature search prior art, Chinese patent publication number: CN1261385C, patent name: cementitious capillary waterproofing material and production technique thereof and constructional method, this patent mainly with cement as main base material, mix a certain amount of activeconstituents and levigate quartz sand outward, excite to react and generate micro crystal and play block pores and improve impervious waterproof ability thereby enter concrete structure inner utilization activeconstituents, but its price is very expensive with the inside concrete hydrated product by osmosis.Also find in the retrieval, patent name is " concrete waterproofer " (Chinese patent publication number: CN1115312C), this invention has proposed a kind of employing sylvic acid, polyvinyl alcohol, diethanolamine, trimeric cyanamide and 12 tabernaemontanus bulrush sodium sulfonates etc. and has heated compound formulated by a certain percentage, its product mixes in the concrete to improve concrete impervious ability with liquid state, the main mechanism of action is to improve concrete density by diminishing, but in actual applications, its barrier performance is very ineffective.
Summary of the invention
The objective of the invention is at having deficiency and defective in the prior art, provide a kind of efficiently, persistent, cheap, multi-functional impervious microcrystal waterproof agent for concrete, suitably adjust the prescription and the production technique of this material, it can be used as the mending-leakage patching material and uses.
The present invention is achieved by the following technical solutions, and each component and weight percent thereof that the present invention comprises are:
Industrial SiO
225~35%
Industrial Al
2O
34~15%
Ultrafine slag 15~25%
Levigate quartz sand 34~45%
Polyacrylic fibre 0.2~0.5%
High efficiency water reducing agent 0.5~0.8%
Described industrial SiO
2, its purity 〉=99% is more than fineness 800 orders.
Described industrial Al
2O
3, its purity 〉=95%, more than fineness 1000 orders.
Described ultrafine slag, its specific surface area are 5000~8000cm
2/ g.
Described levigate quartz sand, it should meet following particle diameter and grating requires:
8~20 orders 15~20% (weight ratio)
20~40 orders 20~30% (weight ratio)
40~60 orders 30~35% (weight ratio)
60~80 orders 15~20% (weight ratio)
80~100 orders 10~15% (weight ratio)
〉=100 orders 5~10% (weight ratio).
Described polypropylene fibre, its length should be controlled to be 5~15mm, and diameter is 30~50um.
Described high efficiency water reducing agent is an admixture naphthalenesulfonate series high-efficiency water-reducing agent powder, and addition content is 0.20~0.40%.
The preparation method of the above-mentioned additive of the present invention is: claim required industrial SiO by formula rate
2, industrial Al
2O
3, ultrafine slag, levigate quartz sand, polyacrylic fibre and high efficiency water reducing agent, in stirrer, stir, form product, pack.During on-the-spot the use, be that 8~10% of cement consumption is advisable as its volume of a kind of cement additire.
Compared with prior art, product of the present invention has following special character: the present invention adopts the high reactivity industry SiO of some amount
2And Al
2O
3Adding water with cement mixes and is hydrolyzed into colloidal sol when stirring, these colloidal sol molecules may penetrate in the pore of cement slurry inside, block and the cut-out capillary-size pore, the calcium hydroxide of ultrafine slag and hydrated cementitious product generation simultaneously reacts, generate Calucium Silicate powder and cement stone and form integral body, unhydrolysed crystallite of part and levigate quartz sand fill concrete hole, the density of increase cement stone.At industrial SiO
2, industrial Al
2O
3Under the mutual common physics chemical action of ultrafine slag, along with the continuous aquation of cement, make the density of cement stone constantly strengthen, seem more lasting.The present invention does not exist aging and inefficacy to the effect of reinforcing bar non-corroding, is a kind of very excellent dual-purpose water-proof material.
Embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Claim required industrial SiO by formula rate
2, industrial Al
2O
3, ultrafine slag, levigate quartz sand, polyacrylic fibre and high efficiency water reducing agent, in stirrer, stir, form the multifunctional impervious microcrystal waterproof agent for concrete product, pack.According to the engineering application need,, can obtain needed performance by adjusting prescription.In specific implementation process, each weight percentages of components is:
Said components gets multifunctional impervious microcrystal waterproof agent for concrete by aforementioned prepared.Adding the waterproof additive of embodiment 1 preparation to proportioning by 8% of cement consumption is: cement: yellow ground is in the mortar of 1:3, is used to repair a roof that leaks for many years, and through the observation more than 1 year, not seeing has the infiltration phenomenon.Adding the waterproof additive of embodiment 2 preparation to proportioning by 10% of cement consumption is: cement: yellow ground is in the mortar of 1:3, be used to repair a moist for many years vault, through one month time, it is very dry that vault ground becomes, and free from dampness and general damp phenomenon occur.To add the design strength grade respectively to by 10% of cement consumption be 15MPa with the waterproof additives of embodiment 3 and 4 preparations, anti-penetration grade is in the concrete of S4, after 60 days, test, during the normal concrete impermeability test, when permeable pressure reaches 0.4MPa, test specimen is all permeable, and the concrete impermeability test pressure of admixture embodiment 3 yet there are no permeable when reaching 3.0MPa; And admixture embodiment's 4 have only 1 test specimen permeable, and remaining does not all have permeable phenomenon.