CN103193412B

CN103193412B - Highly sulfate-resistant anti-corrosion anti-crack water-proofing agent

Info

Publication number: CN103193412B
Application number: CN201310136613.3A
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: 2014-07-16
Anticipated expiration: 2033-04-19
Also published as: CN103193412A

Abstract

The invention discloses highly sulfate-resistant anti-corrosion anti-crack water-proofing agent. The highly sulfate-resistant anti-corrosion anti-crack water-proofing agent is prepared by co-mixing the following materials in parts by weight: 13-17 parts of quick limes, 1-3 parts of polyhydroxy etherfied tripolycyanamide, 9-13 parts of super-fine silicon oxide, 23-25 parts of sulfoaluminate clinker, 35-38 parts of anhydrite, 0.4-0.9 part of re-dispersible high-molecular polymer and 13-16 parts of sodium nitrite. During a concrete preparation process, the weight of cementing material doped in the concrete is 8%-10%, so that the anti-seepage-proofing performances and the anti-corrosion performances of the concrete are improved and the durability of the structure is greatly strengthened.

Description

High sulfate resisting resistance rust anti-crack water-proof agent

Technical field

The present invention relates to a kind of water-resisting agent, relate in particular to a kind of high sulfate resisting resistance rust anti-crack water-proof agent.

Background technology

The ability of concrete building structures opposing environmental attack is the vital index of its weather resistance, has brought very large financial loss every year because environmental attack causes building destruction.Environmental attack comprises SO in soil and groundwater ₄ ^2-, Cl ^-, Mg ²⁺, K ⁺and Na ⁺corrosion to concrete inner structure, CL in soil, underground water ^-to corrosion of reinforcing bar etc., these many countries are all being taked to positive safeguard procedures.Its main method is for to take outer anti-corrosion measure or reinforcing bar is carried out to Passivation Treatment on concrete member top layer, for complicated concrete member, outer anti-corrosion measure is often difficult to construction, and external anti-corrosion layer mostly is organism, work-ing life is limited, and the timeliness of its anti-corrosion effects also needs to consider.Therefore, for buildings, strengthen its resistance to corrosion, in concrete, the anticorrosive class admixture of admixture is the measure of putting things right once and for all.

Current anticorrosive class admixture majority is the ability that improves concrete anticorrosion for strengthening, and has reinforcing bar resistance rust ability in the time of some, and what have does not have.But generally not having compensation concrete shrinks and avoids concrete to occur that crack causes the ability of structural leakage, and concrete structure seepage is the main Quality that current construction work exists, and be the chronic disease that is difficult to improvement, once find seepage after buildings comes into operation, need to spend high maintenance cost.

Summary of the invention

Object of the present invention is exactly for the deficiency of like product in the market, to improve a kind of high sulfate resisting resistance rust anti-crack water-proof agent of development, make it when strengthening concrete member resistance to corrosion, can passivation reinforcing bar, improve the resistance rust ability of reinforcing bar, and can avoid the generation of distress in concrete, reduce the possibility of structural leakage, and then guarantee the weather resistance of buildings.

Described water-resisting agent is formed by unslaked lime, poly-hydroxy etherificate trimeric cyanamide, high thin silicon oxide, sulfoaluminate clinker, anhydrite, redispersible high molecular polymer and Sodium Nitrite mixed preparing.

The preparation of raw material composition by weight of described water-resisting agent is: the unslaked lime of 13-17 part, the poly-hydroxy etherificate trimeric cyanamide of 1-3 part, the thin silicon oxide of height of 9-13 part, the sulfoaluminate clinker of 23-25 part, the anhydrite of 35-38, the redispersible high molecular polymer of 0.4-0.9 part, the Sodium Nitrite of 13-16 part.

Described water-resisting agent volume be in concrete gelling material weight 8 ~ 10%, high thin silicon oxide granularity is at 10～25nm, redispersible high molecular polymer is redispersible latex powder.

The mechanism of action: the early stage moulding contraction producing of unslaked lime compensating concrete, avoid concrete to produce in early days cracking, sulfoaluminate clinker and anhydrite, by the contraction that compensating concrete each stage in the length of time produces, farthest avoid concrete to produce crack, reduce the possibility of structural leakage; Poly-hydroxy etherificate trimeric cyanamide is adjusted concrete serviceability, makes concrete constructability; The high thin silicon oxide of inorganic compact component and organic fine and close component high molecular polymer strengthen concrete density, greatly reduce the infiltration passage of harmful ion, strengthen the anti-corrosion capability of concrete integral body; Sodium nitrite passivation reinforcing bar, can make reinforcement in concrete surface produce a kind of complex film, stops Cl ^-corrosion to reinforcing bar.

Embodiment

1, high sulfate resisting resistance rust anti-crack water-proof agent part by weight forms:

Unslaked lime	High thin silicon oxide	Sulfoaluminate clinker	Anhydrite	Redispersible latex powder	Poly-hydroxy etherificate trimeric cyanamide	Sodium Nitrite
							14	9.7	24	36	0.5	1	14.8

During use, in the volume of 8-10% (accounting for gelling material gross weight ratio), add in concrete, through participating in hydration reaction, can make concrete produce early stage, mid-term and the late expansion of appropriateness, the dry shrinkage and cold shrinkage in effective compensation concrete each length of time, to avoid producing crack, greatly improved concrete crack resistance, the effect that a large amount of ore deposits that aquation forms simultaneously have filling pore seam mutually attenuates pore, reduce, increased density, and high molecular polymer component removes among the pore seam that can directly be filled in inside concrete, can also improve the force of cohesion of the various materials of inside concrete, make concrete structure finer and close, reduce concrete contraction, can significantly improve concrete anti-penetration grade and waterproof ability, meanwhile, reduced the infiltration lane of harmful ion, and at the surperficial complex film that forms one deck densification of concrete reinforcement, avoid the corrosion of harmful ion to reinforcing bar, and then the resistance to corrosion of enhancing concrete member, guarantee the weather resistance of concrete member comprehensively.

2, high sulfate resisting resistance rust anti-crack water-proof agent performance index:

The performance index of table 1 high sulfate resisting resistance rust anti-crack water-proof agent

Table 2 is examined concrete performance index

Claims

1. a high sulfate resisting hinders rust anti-crack water-proof agent, described water-resisting agent is by unslaked lime, poly-hydroxy etherificate trimeric cyanamide, high thin silicon oxide, sulfoaluminate clinker, anhydrite, redispersible high molecular polymer and Sodium Nitrite mixed preparing form, it is characterized in that, the preparation of raw material composition by weight of described water-resisting agent is: the unslaked lime of 13-17 part, the poly-hydroxy etherificate trimeric cyanamide of 1-3 part, the thin silicon oxide of height of 9-13 part, the sulfoaluminate clinker of 23-25 part, the anhydrite of 35-38 part, the redispersible high molecular polymer of 0.4-0.9 part, the Sodium Nitrite of 13-16 part.

2. high sulfate resisting according to claim 1 resistance rust anti-crack water-proof agent, is characterized in that, volume be in concrete gelling material weight 8 ~ 10%.

3. high sulfate resisting resistance rust anti-crack water-proof agent according to claim 2, is characterized in that, high thin silicon oxide granularity is at 10～25nm.

4. high sulfate resisting resistance rust anti-crack water-proof agent according to claim 3, is characterized in that, redispersible high molecular polymer is redispersible latex powder.