As the building materials chemical assistant of effects such as concrete demoulding, maintenance, waterproof, in concrete construction, be used widely.These auxiliary agents have its common ground, and promptly they all are the liquid membrane-forming agents of emulsion-type, and its main component is a filmogen, emulsifying agent, assistant medicament.Because of each agent role difference, also inequality to the selection of film forming matter.Select the oily material that frictional coefficient is little, intermolecular attraction is little as remover, curing agent is selected the not high temporary water-proof material of mechanicalness index, water-resisting agent is then selected to have the low molecule or the polymer of long-chain and is formed, film forming firmly, can the storage pore, block capillary channel, reduce the material of water-permeable.Therefore existing auxiliary agent only has simple function basically, can not three functions possess entirely.
In addition, present releasing agent mostly is fatty acid soaps class, seed fat foot soap class, emulsification oils greatly, cost height not only, the price height as 890 yuan of W-15 releasing agent prices per ton, and is coated with once, can only the demoulding once, easily be stained with ash, release agent coating can not water-fastly wash away.Curing agent has the RT175 of vinylchlorid, vinylidene chloride interpolymer, 5600 yuan/ton of its prices, and the solvent borne curing agent of emulsified olefin type, resene, its cost height, water retention property is poor.Water-resisting agent adopts emulsified bitumen basically, its construction cost height, contaminate environment.
Purpose of the present invention is intended to develop a kind of building materials auxiliary agent as multiple functions such as concrete demoulding, maintenance, waterproof, and this auxiliary agent raw material mainly adopts chemical spent material, and cost is low.The manufacturing process of design is simple, but this auxiliary agent is once brushed demoulding 2-3 time, and stripping result is good, water-fast the washing away of release coating energy, and the maintenance water conservation is effective, and water resistance is good.
The objective of the invention is to realize in the following manner, the multifunctional concrete auxiliary agent is made into by film forming matter, emulsifying agent, auxiliary, and film forming matter adopts acid sludge, paraffin, and emulsifying agent adopts pure slag, levelling agent 0(polyoxyethylene aliphatic alcohol ether), concrete weight proportion is:
Acid sludge paraffin alcohol slag caustic soda water
100~175 25~100 60~90 1.7~5.7 to add to concentration be 30~56%
Auxiliary agent outward appearance: pale brown look milk sap solid content: 30%-56%
Viscosity (being coated with-4 glasss): 12-13 second (30-35%) PH: about 7
Emulsion particle size: 3-4 micron
Stability of emulsion: 15 minutes not stratified or layering≤5% of 3000 rev/mins of high speed centrifugations, place not breakdown of emulsion of 2-3 under the good sample room temperature naturally.
The preparation technology of multifunctional assistant for concrete-containing building material is: earlier with more than the acid sludge heat fused to 90 ℃, under constantly stirring, the alkali lye that slowly adds the 5-10% of heat, continue to stir saponification 15-20 minute down at 85-90 ℃, after treating saponification fully, the mixed solution that adds the pure slag melted, paraffin, levelling agent 0 while hot, stir, the heating emulsifying water, in 85-95 ℃ of following insulated and stirred, after waiting to be incubated emulsification 30-40 minute emulsion, stir cooling with water coolant again, or being cooled to 40 ℃ naturally, discharging is product.
The multi-functional assistant for concrete-containing building material of preparation potion, the multiple material that need have various performances carries out compound preparation, and chemical spent material is formed complexity, it is the mixture of multiple composition, therefore to select to have hydrophobic nature structure and low molecule or the molecular chemical spent material of high score be the main composition of film forming matter to this auxiliary agent, through heating saponification, chemical modification, in addition other auxiliarys make film forming matter have multifrequency nature.Acid sludge as film forming matter has:
(1) synthetic fatty acid acid sludge: residue at the bottom of the still of paraffin oxidation synthetic fatty acid,
(2) natural fat acid sludge: the animals and plants oil foot extracts the acid sludge behind the lipid acid.
(3) residue behind stearic acid sludge (4) the soap system extraction glycerine
The main synthetic fat acid sludge of using, its acid value with 50-62 number for well.
No. 62 refining product of paraffin employing or semi-refined product.
Pure slag as emulsifying agent is
(1) higher alcohols slag: after the Fatty Alcohol(C12-C14 and C12-C18) fractionation, carbon number be higher than 16 after heat up in a steamer pure slag, be generally the mixture of 18-22 carbon number, its source has two: a kind of is the synthol slag that whiteruss makes after distillation with atmospheric oxidation in the presence of boric acid, or distills the synthol slag that makes from second unsaponifiables of producing synthetic fatty acid after the boric acid acidifying.Heat up in a steamer pure slag after after the fractionation of another kind Oleum Cocois hydrogenation system alcohol.
(2) the secondary unsaponifiables of synthetic fatty acid.
Water: tap water or soft water.
Auxiliary agent of the present invention is sprayed at the fresh concrete surface, forms fluid-tight polymolecular film, the unnecessary water that concrete mixing is used is closed in the concrete, suppresses and delayed the moisture loss in concrete premature cure stage, plays the water-preserving curing effect.Carry out relevant test with the ASTMC156 method of general in the world mensuration curing agent moisture loss amount, and compare with existing curing agent, it the results are shown in Table 1.
Table 1
This auxiliary agent water retention property is good as seen from the table.
When measuring the moisture loss amount, also carried out having blank correlated relative water retention test, blank comparative group is calculated as follows relative water retention for not being coated with the test specimen of curing agent:
Relative water retention=(blank test specimen moisture loss amount-test block moisture loss amount)/(blank test specimen moisture loss amount) * 100%,
After measured, the relative water retention that calculates this auxiliary agent is 90%.
The ultimate compression strength of the also available maintenance part of maintenance performance of curing agent is evaluated.The moisture loss amount is little, hydrated cementitious is abundant, and gain in strength is normal, otherwise then intensity is on the low side.Compare test with different curing agents, its comparing result sees Table 2.
Table 2
Good from the maintenance performance of table 2 also visible this auxiliary agent.
This auxiliary agent is coated on the concrete formation template, forms one deck sealing coat on the surface, so stripping result is good, to concrete bottom die, the loose tool particularly suitable that is difficult to the demoulding.With the test method of 0.4 * 0.2 * 0.05 meter concrete slab of moulding, the RH releasing agent of W-15, Wanrong, Shanxi that detects this auxiliary agent and Wuhan chemical industry two factories is to the demolding performace of metal pattern, concrete bottom die, and its detection, comparing result see Table 3.
Table 3
As seen from the table, it is many that this auxiliary agent and other releasing agents are compared release times, and film forming is firm, and the water logging bubble can water-fastly be washed away or enclose to the demoulding coating of releasing agent.
This auxiliary agent is sprayed at concrete surface, and the energy water-proof is at autumn in summer high temperature season, even soaked 6 months surperficial no change in water.
Hubei Province building slab factory is sprayed at this auxiliary agent on the bed die of concrete floor, and the cast prestressed hollow slab is coated with once, and the demoulding is twice continuously.When playing plate, cut off compressor wire, floor can break away from the mulch film terrace automatically.The simulation heavy rain wash away with rain after accumulated water, penetrate high pressure water with 5 meters and washed away 10 minutes or enclosed water logging bubble 48 hours, release agent coating stands intact, and soaks six days, the face color does not take off.
Wuhan Iron and Steel Plant foreign trade harbour is with 1 * 0.5 * 0.06 meter Steel Concrete trench cover of this auxiliary agent maintenance, and the film forming fast drying can effectively prevent the generation of desciccation crack.
This auxiliary agent is a main raw material with chemical spent material, has multiple functions such as the demoulding, maintenance, waterproof.As releasing agent, a coating, but demoulding 2-3 time, demoulding component surface is smooth, and release agent coating can water-fast washing away, and encloses water logging and steep.As curing agent, moisture loss is 0.030g/cm
2, film forming 0.5-1 time of drying hour.As waterproof paint, enclose water logging bubble coating no change after June.This auxiliary agent production cost is low, and cost of use is low, suits large area to popularize.
Enumerate embodiments of the invention below:
Example 1,75 gram acid sludge places little porcelain enamel barrel, is heated in oil bath more than 90 ℃, and 5% the caustic soda soln 34ml that stirs on one side that slow adding boils adds alkali lye in 88-92 ℃ of saponification 25 minutes.In another beaker, with the secondary unsaponifiables of 43 gram synthetic fatty acids, 25 restrain No. 62 paraffin of full refinings simultaneously, 1.5 gram levelling agent 0 mixes, after the fusing, it is joined in the above-mentioned saponification material while hot in boiling water bath, temperature is controlled at 85-90 ℃, stir after 5-10 minute, slowly add 200ml hot water, stirred 40 minutes in 85 ℃ of left and right sides constant temperature, cooling is stirred to 40 ℃ naturally, get product 260 grams, working substance content 56%.
Example 2,100 gram acid sludges are heated in oil bath more than 90 ℃, slowly add 5% the alkali lye 46ml that boils under constantly stirring, in 85-90 ℃ of saponification about 15 minutes, and moisturizing frequently, treat that saponification adds the pure slag of 86 grams fully while hot, semi-refined No. 62 paraffin of 100 grams, the consolute thing of 3 gram leveling agent ds after 10 minutes, slowly adds hot water emulsification in 89-91 ℃ of stirring, after 85 ℃ of left and right sides constant temperature stir 30 minutes, naturally cooling is stirred to 40 ℃ of dischargings, gets product 799 grams, working substance content 36%.
Example 3,175 gram acid sludges are heated to more than 90 ℃, stir to add 5% alkali lye 64ml down, in 85-90 ℃ of saponification, complete to saponification, add No. 62 paraffin of 25 grams, the melts of the pure slag of 70 grams, 3 gram leveling agent ds, stirred 10 minutes in 85-90 ℃, add boiling water emulsification, after 85 ℃ of left and right sides constant temperature stirred 40 minutes, cooling was stirred to 40 ℃ naturally, get product 920 grams, working substance content 30%.