CN101066849A

CN101066849A - Anticracking waterproof agent

Info

Publication number: CN101066849A
Application number: CN 200710014782
Authority: CN
Inventors: 季元升; 亓良树; 毕春楷; 王立明; 冯乃谦; 刘立欣; 黄翠; 季永亮; 刘建辉; 季冠祥; 于钊勋; 季文忠; 杨升余
Original assignee: 季元升
Current assignee: Shandong Dayuan Industrial Co.,Ltd.
Priority date: 2007-05-22
Filing date: 2007-05-22
Publication date: 2007-11-07
Anticipated expiration: 2027-05-22
Also published as: CN100540499C

Abstract

The present invention discloses one kind of anticracking waterproof agent, which is prepared with anhydrite, aluminum ore powder, lime, naphthalene water reducing agent, magnesium stearate, calcium glyconate, sodium tripolyphosphate, migrating antirust agent, methyl cellulose and triterpenoid saponin powder. The anticracking waterproof agent can raise the compactibility, antiseep function, antirust function and durability of concrete greatly.

Description

Anti-crack water-proof agent

Technical field

The present invention relates to the material of construction subsidiary material, especially relate to a kind of anti-crack water-proof agent that is used for concrete material.

Background technology

Development along with construction industry, main raw as construction industry---concrete usage quantity is also increasing gradually, and people are also more and more higher to concrete requirement, concrete develops towards the high-intensity direction of high-performance, water-binder ratio is more and more littler, and gel material content, sand coarse aggregate ratio is increasing, and as heterogeneous hard brittle material, concrete can occur expanding with heat and contract with cold and the moisture expansion and drying shrinkage phenomenon, this phenomenon was more obvious when especially water-cement ratio was low, caused the factor of concrete shrinkage to increase, and was prone to the crack after the concrete setting, produce the seepage phenomenon, have a strong impact on concrete weather resistance.In order to solve this phenomenon, people successively adopt and adjust concrete coarse-fine aggregate, increase cement consumption and add measures such as various water-resisting agents, swelling agent and improve concrete density and resistance to cleavage.But these additives are function singleness not only mostly, and the waterproofing and anti-leakage effect is relatively poor, and its slump is all less, is difficult for pumping construction, and this just makes concrete produce crack and seepage phenomenon easily.

Summary of the invention

The invention provides a kind of anti-crack water-proof agent, after concrete adds this anti-crack water-proof agent, not only can pumping construction, and can improve concrete antiseep function and density greatly, prevent that concrete from producing the crack, concrete weather resistance also is greatly improved simultaneously.

For solving the problems of the technologies described above, technical scheme of the present invention is: anti-crack water-proof agent is that the preparation of raw material by hundred parts of ratios of following weight forms: dehydrated gyp-36～43%, aluminium ore powder 33～38%, lime 7～10%, naphthalene water reducer 9～13%, Magnesium Stearate 1.5～3.0%, calglucon 1.4～1.8%, tripoly phosphate sodium STPP 1.6～2.0%, migration-type rust inhibitor 0.4～0.7%, methylcellulose gum 0.02～0.05%, triterpenoid saponin powder 0.1～0.2%.

For easy to use, anti-crack water-proof agent can produce Powdered.

It is dehydrated gyp-36～43% that this anti-crack water-proof agent can adopt hundred parts of ratios of weight, aluminium ore powder 33～38%, lime 7～10%, naphthalene water reducer 9～13%, Magnesium Stearate 1.5～3.0%, calglucon 1.4～1.8%, tripoly phosphate sodium STPP 1.6～2.0%, migration-type rust inhibitor 0.4～0.7%, methylcellulose gum 0.02～0.05%, triterpenoid saponin powder 0.1～0.2% mixes in mixing equipment such as mixed model machine, be transported to then in the grinding plant such as ball mill, grind to form the powder of regulation fineness, be transported to afterwards in the homogenization devices such as homogenizing storehouse and carry out homogenizing, promptly make pulverous anti-crack water-proof agent.

This anti-crack water-proof agent is that this agent (but and equivalent replacement cement) of mixing gelling material weight 9～10% in concrete can obtain the pump concrete that the slump is the anti-cracking waterproof of 17～23cm in use.Mix formula in adopting during construction 10% anti-crack water-proof agent of cement weight is joined in the aggregates such as cement, sandstone, first dry mixing, and then add entry and carry out wet-mixing, adopting the normal concrete alr mode during stirring, churning time can prolong about 1 minute.Only need vibrate a little after the concrete placement can be closely knit, and vibrating time can not be long, and vibration compacting gets final product.Finish in concrete depositing, after looking concrete surface and receiving water, in time adopt coverings such as plastic cloth or straw mat, need to keep the maintenance of concrete dampness more than 14 days.

In the concrete that adds this anti-crack water-proof agent, microdilatancy effect by dehydrated gyp-, aluminium ore powder, lime, the contraction when but compensating concrete is dry, to reduce concrete self-constriction and dry-shrinkage deformed, thereby prevent that concrete from producing the crack, to improve concrete antiseep function, play certain early strength function simultaneously again; By the effect of naphthalene water reducer such as FDN-A, improve concrete workability and reduce concrete water consumption to increase concrete density; Waterproof hydrophobicity performance by Magnesium Stearate makes on the capillary wall in the concrete and forms water-repellent layer, simultaneously with concrete in cement generate the hydrophobic nature insoluble substance, improve concrete water resistance; And the triterpenoid saponin powder can be used as air entrapment agent and can reduce concrete harmful hole, and cuts off capillary channel, and increases concrete weather resistance; By the delayed coagulation of calglucon, tripoly phosphate sodium STPP, make the slow aquation of concrete, sclerosis, reaching the peak value that reduces hydration heat, thereby reduced the crack that concrete produces because of the temperature difference; Commonly used (U.S. produces a kind of rust inhibitor as MCI-2006NS and adopt, Hai Yuan reinforcement material business department sells by Jinan) or Mucis ad 19L/D (a kind of rust inhibitor that Italian Tylenol chemical company produces, become the sail International Trade Corporation to sell by Tianjin) the migration-type rust inhibitor, it can migrate to the surface of reinforcing bar in the concrete, prevent the reaction of rebar surface generation anode and cathode, avoid corroding with the protection reinforcing bar, can also resist simultaneously the erosion and the muriatic erosion under change cryosel and briny environment of hazardous medium in the atmosphere, to prolong the life-span of Steel Concrete; Water-keeping thickening effect by methylcellulose gum, to improve the care action of concrete self, to reduce the evaporation of concrete bleeding and surface-moisture, prevent that the concrete non-uniform settling from producing the crack, and promote cement to continue aquation to reduce the dry shrinkage of concrete crackle, improve concrete antiseepage function.By the not same-action of above each composition, improve concrete workability, density, concrete antiseep function greatly, concrete weather resistance also can be greatly improved simultaneously.

Concrete slump and water-reducing rate behind 10% anti-crack water-proof agent of admixture

Project	Material		Weight kg	Slump mm
				Slump mm			Initially	30min	60min
				The normal concrete proportioning	Cement		Initially	30min	60min	8.58	100	/	/
Sand		17.54			Cement					8.58
Sand		17.54	10～20 stones		13.4
5～10 stones		8.94	10～20 stones		13.4
5～10 stones		8.94	Water		4.8
Admixture 10% water-resisting agent concrete proportioning		Cement 7.72kg, water-resisting agent 0.858kg, the same normal concrete of sand stone, water 4.16 kg (water-reducing rate 13.3%)			4.8	205	190	180

As seen, at admixture the concrete behind this anti-crack water-proof agent have bigger diminishing and strong plasticizing function, can make more than the concrete slump increase 10cm, and slump-loss is less.

Because this anti-crack water-proof agent has functions such as diminishing, plasticizing, filling, expansion, can make concrete reach maximum density, thereby concrete resistance to compression, tension, folding strength all are greatly improved.Concrete compressive strength rate such as following table behind this anti-crack water-proof agent of admixture.

10% anti-crack water-proof agent concrete crushing strength ratio of admixture

Title	Curing age d	Pressure KN			Ultimate compression strength Mpa			Average intensity Mpa	Compressive strength rate %
		Pressure KN			Ultimate compression strength Mpa					1	2	3	1	2	3
		Normal concrete	3	201	208	194	19.1			1	2	3	1	2	3	19.8	18.4	19.1	100
7	324		3	201	208	194	19.1	290	326	30.8	27.6	31.0	29.8	100		19.8	18.4	19.1	100
7	324		28	420	422	418	39.9	290	326	30.8	27.6	31.0	29.8	100	40.1	39.7	39.9	100
Admixture 10% water-resisting agent concrete	3		28	420	422	418	39.9	261	288	235	24.8	27.3	22.4	24.9	40.1	39.7	39.9	100	130.4
	3	7	420	386	377	39.9	36.7	261	288	235	24.8	27.3	22.4	24.9	35.8	37.4	125.5		130.4
	28	7	420	386	377	39.9	36.7	496	490	495	47.2	46.5	48.0	47.2	35.8	37.4	125.5	118.3

The microdilatancy of dehydrated gyp-, aluminium ore powder, lime and reduce effect, compensated concrete dry shrinkage, reduced concrete self-constriction and dry-shrinkage deformed, thereby prevent distress in concrete, improved concrete antiseep function, its permeable height is compared with normal concrete, can reduce about 88.8%.Its shrinking percentage such as following table.

10% anti-crack water-proof agent concrete shrinkage of admixture rate ratio

Sample	Useful length mm	Initial length mm	Length m m after 28 days	Shrinking percentage %	Average shrinkage ratio %	28 days shrinkage ratio %
Sample	Useful length mm	Initial length mm	Length m m after 28 days	Shrinking percentage %	Average shrinkage ratio %	28 days shrinkage ratio %	Normal concrete	470	16.22	6.01	0.04468	0.0461	96.9
25.67	5.45	0.04681							16.22	6.01	0.04468
25.67	5.45	0.04681	35.95	5.73	0.04681
10% water-resisting agent concrete of admixture	470	46.64	35.95	5.73	0.04681	6.43			0.04681	0.04468
		46.64	57.20	7.00	0.04255	6.43			0.04681
		66.91	57.20	7.00	0.04255	6.71	0.04468

And because this anti-crack water-proof agent contains an amount of triterpenoid saponin powder bleed composition, so concrete at admixture behind this anti-crack water-proof agent, its air content can improve 1～2%, and produce evenly small CAB, with the capillary channel in the cut-out concrete, thereby improve durability of concrete greatly.Its air content is as table.

10% anti-crack water-proof agent concrete 's air-containing of admixture

Amount alms bowl volume L	Amount alms bowl quality kg	Aggregate quality kg	Aggregate air content %	Pressure tabular value Mpa	Total air content %	Mean value %	Concrete 's air-containing %
Amount alms bowl volume L	Amount alms bowl quality kg	Aggregate quality kg	Aggregate air content %	Pressure tabular value Mpa	Total air content %	Mean value %	Concrete 's air-containing %	7.0	3.82	12.6	0.49	0.059	3.4	3.35	2.86
0.060	3.3											0.059	3.4

Simultaneously, the alkalinity in this anti-crack water-proof agent is also lower, about 0.71%, has avoided the alkali-aggregate reaction behind this anti-crack water-proof agent of concrete admixture, has improved concrete weather resistance.

This anti-crack water-proof agent can be by routine the preparation method of pulvis water-resisting agent produce, promptly can adopt hundred parts of ratios of weight is dehydrated gyp-36～43%, aluminium ore powder 33～38%, lime 7～10%, naphthalene water reducer 9～13%, Magnesium Stearate 1.5～3.0%, calglucon 1.4～1.8%, tripoly phosphate sodium STPP 1.6～2.0%, migration-type rust inhibitor 0.4～0.7%, methylcellulose gum 0.02～0.05%, the various materials of triterpenoid saponin powder 0.1～0.2% mix in conventional mixing equipment such as mixed model machine, can be transported to the powder that grinds to form the regulation fineness in the grinding plant such as ball mill then by handling equipments such as rotary conveyors, be transported to afterwards in the homogenization devices such as homogenizing storehouse and carry out homogenizing, promptly make pulverous anti-crack water-proof agent.And the various raw materials of producing this anti-crack water-proof agent all can commercially obtain, and the various device of using in the production process also is equipment known in the art.

Embodiment

Embodiment one

Adopting hundred parts of ratios of weight is dehydrated gyp-39%, aluminium ore powder 37%, lime 7%, FDN-A 10%, Magnesium Stearate 3%, calglucon 1.4%, tripoly phosphate sodium STPP 2.0%, migration-type rust inhibitor 0.4%, methylcellulose gum 0.03%, the material of triterpenoid saponin powder 0.1% mixes in mixing model machine, is transported to the powder that ball mill grinding becomes the regulation fineness by rotary conveyor then, be transported to afterwards after homogenizing storehouse carries out homogenizing, promptly make pulverous anti-crack water-proof agent.

Embodiment two

Adopting hundred parts of ratios of weight is dehydrated gyp-36%, aluminium ore powder 33%, lime 10%, FDN-A13%, Magnesium Stearate 2%, calglucon 1.5%, tripoly phosphate sodium STPP 1.6%, migration-type rust inhibitor 0.7%, methylcellulose gum 0.05%, the material of triterpenoid saponin powder 0.2% mixes in mixing model machine, is transported to the powder that ball mill grinding becomes the regulation fineness by rotary conveyor then, be transported to afterwards after homogenizing storehouse carries out homogenizing, promptly make pulverous anti-crack water-proof agent.

Claims

1, anti-crack water-proof agent, it is characterized in that it is that preparation of raw material by hundred parts of ratios of following weight forms: dehydrated gyp-36～43%, aluminium ore powder 33～38%, lime 7～10%, naphthalene water reducer 9～13%, Magnesium Stearate 1.5～3.0%, calglucon 1.4～1.8%, tripoly phosphate sodium STPP 1.6～2.0%, migration-type rust inhibitor 0.4～0.7%, methylcellulose gum 0.02～0.05%, triterpenoid saponin powder 0.1～0.2%.

2, anti-crack water-proof agent as claimed in claim 1 is characterized in that: described naphthalene water reducer is the FDN-A water reducer.

3, anti-crack water-proof agent as claimed in claim 1 or 2 is characterized in that: described anti-crack water-proof agent is Powdered.