CN106517846A - Preparation method for anti-permeability self-repairing concrete - Google Patents

Abstract

The invention relates to a preparation method for anti-permeability self-repairing concrete and belongs to the technical field of preparation of anti-permeability self-repairing concrete. According to the method, polyhydric rape pollen serves as a crystal nucleus, the polyhydric rape pollen, a urea solution and a calcium hydroxide solution are heated under the environment of nitrogen pressurization, urea is made to be hydrolyzed to release carbon dioxide which reacts with calcium hydroxide to generate a calcium carbonate crystal adsorbed on the pollen crystal nucleus, and a self-repairing filler is prepared; and after glutinous rice cultivation microorganisms, the self-repairing filler and other auxiliary materials are composited, the concrete is obtained. Once the concrete prepared through the preparation method cracks, the metabolism function of the microorganisms in the dormant state is restored, carbon dioxide is generated and reacts with the pollen calcium carbonate crystal under the condition of water, a calcium carbonate crystal continues to be formed, and therefore the crystal nucleus can continuously grow and become large till a concrete gap is completely blocked, the anti-permeability self-repairing function of the concrete is achieved, and wide application prospects are achieved.

Description

A kind of preparation method of impervious self-repair concrete

Technical field

The present invention relates to a kind of preparation method of impervious self-repair concrete, belongs to impervious self-repair concrete technology of preparing Field.

Background technology

With the high development of human society, modern architecture proposes new challenge to concrete material, it is desirable to concrete Material not only wants load-bearing, should also have the functions such as sound, light, electricity, magnetic, heat, to adapt to multi-functional and intelligent building needs.Repair Concrete is present most widely used construction material and structural material, repair concrete due to the constituent of structure itself and , often there are some original microcracks in its bearing capacity feature, at which during one's term of military service, with change and the time of load inside which Passage, its internal crackle can be extended to crack, or even extending into surface causes concrete material to ftracture, and split insertion is formed After seam, concrete is subject to the erosion and destruction of external environment and various adverse factors, such as steel bar corrosion, carbonization, chlorion Erosion and sulfate attack etc., ultimately result in the cracking of concrete material, destroy, are unsatisfactory for use requirement, have a strong impact on coagulation The durability of soil material.From the mid-90 in 20th century, functional form and intelligent cement-based material are successively carried out both at home and abroad Research, and some valuable achievements are achieved, the cement based conductive composite material for such as occurring in succession, cement base magnetic coupling material Material, is capable of the cement-base composite material of armoured magnetic field and electromagnetic wave, material stress, strain and damages Autonomous test cement base composite wood Material and Self-temperatuer Sensing cement-base composite material.But, how environment can be adapted to automatically using concrete and its structure, be subject to Self-heal after damage, and the study mechanism to self-repair concrete, now the only a few countries such as the U.S., Japan are in experiment The room exploratory stage, not yet obtain the achievement in research with Practical significance.But, current concrete easily receives external environment in use Erosion and destruction, make it is impervious with stability in terms of it is poor, self-reparing capability has much room for improvement.

The content of the invention

The technical problem to be solved：Macromolecule renovation agent is adopted in conventional concrete repair process, which is deposited more In not durable, easily erosion and destruction aging, that be subject to external environment problem, there is provided a kind of impervious self-repair concrete Preparation method；The present invention using polyhydric rape pollen as nucleus, by its with urea liquid, aqua calcis in nitrogen Under pressurized environment, heating makes hydrolysis of urea discharge carbon dioxide, and carbon dioxide generates calcium carbonate crystal absorption with calcium hydroxide reaction On pollen nucleus, selfreparing filler is obtained, then other are auxiliary with glutinous rice culture microorganism and selfreparing filler and coarse-fine aggregate etc. Concrete is obtained final product after material compounding, the prepared concrete of the present invention once occurs cracking, microorganism in a dormant state just convalescence Metabolic function output carbon dioxide, reacts with pollen calcium carbonate crystal in the presence of water, continuously forms carbonic acid Calcium is crystallized, so that nucleus constantly grows, change is big until concrete crack is blocked completely, realize concrete it is impervious from Repair function, has broad application prospects.

In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is：

（1）Collect 200～300g rape petal pollens to be poured in the urea liquid that 2～4L mass fractions are 10～15%, with super Sound separating apparatus disperse 30～50min with 200～300W power ultrasonics, obtain pollen suspension, then in above-mentioned pollen suspension It is 1.0～1.2g/L aqua calcises to instill 250～350mL mass concentrations, continues stirring 15～20min of mixing and is reacted Liquid；

（2）Above-mentioned reactant liquor is moved in autoclave, nitrogen is passed through with the speed of 3～5mL/s until kettle internal pressure in kettle Power reaches 2.0～2.3MPa and is warming up to 75～80 DEG C, starts reactor agitator, is protected with the insulation of 200～300r/min rotating speeds Pressure 2～3h of stirring reaction；

（3）After above-mentioned reaction terminates, reactor relief valve is opened, produced in pressure in kettle recovers to normal pressure to take out reactor Thing, with horizontal centrifuge with 2000～3000r/min rotating speed 15～20min of centrifugal treating, isolated lower sediment will precipitation Baking oven is put into, 1～2h is dried at 105～110 DEG C, is obtained selfreparing filler, it is standby；

（4）Rebasing with mulberry leaf after food steamer is cleaned, tile on mulberry leaf glutinous rice, and laying depth is 2～3cm, will after the completion of laying Food steamer steams 40～50min in moving into steamer, takes out ripe glutinous rice after steaming end, moves it in bamboo sieve, treats its natural cooling Move in fermentation tank to room temperature, access Alkaliphilic bacillus for 10% by inoculum concentration on ripe glutinous rice, it is natural at 30～40 DEG C Fermentation 3～5 days, obtains tunning；

（5）Count by weight, weigh 100～120 parts of cement, 50～60 parts of river sands, 10～20 parts of standby selfreparing fillers, 15～20 parts of tunnings obtained above, 3～5 parts of polyvinyl alcohol, 3～5 parts of flyash, the rubble of 200～300 part of 50 mesh and 150～200 parts of deionized waters are sequentially loaded in concrete mixer, are stirred at 45～55 DEG C with 80～100r/min rotating speeds Discharge after 120～150s, obtain final product impervious self-repair concrete.

The present invention application process be：Impervious self-repair concrete obtained by the present invention is layed in into factories and mines road, laying is thick Spend for 12～15cm, with Polypropylence Sheet covering curing 2～3 days, then natural curing 28～30 days, you can.After testing, maintenance of surface knot After beam impermeability pressure improve 30～35%, mean compressive strength improve 15～20%, using 8～10 years, do not produce new crack and Crack, and impervious effect is substantially, and distress in concrete voluntarily can be repaired.

The invention has the beneficial effects as follows：

（1）The preparation method of the present invention is simple, and the made impervious water resistance of impervious self-repair concrete is efficient, lasting, and Improve impermeability and anti-pressure ability；

（2）Obtained by of the invention, impervious self-repair concrete is applied to concrete slight crack, can prevent which from expanding, easily actively, automatically Crackle and damage location are repaired, the intensity for recovering even to improve concrete material extends concrete service life to reach Ground purpose.

Specific embodiment

Collect 200～300g rape petal pollens to be poured in the urea liquid that 2～4L mass fractions are 10～15%, with ultrasound Separating apparatus disperse 30～50min with 200～300W power ultrasonics, obtain pollen suspension, then drip in above-mentioned pollen suspension It is 1.0～1.2g/L aqua calcises to enter 250～350mL mass concentrations, continues stirring 15～20min of mixing and is reacted Liquid；Above-mentioned reactant liquor is moved in autoclave, nitrogen is passed through with the speed of 3～5mL/s until pressure reaches in kettle in kettle To 2.0～2.3MPa and 75～80 DEG C are warming up to, start reactor agitator, stirred with 200～300r/min rotating speed heat-insulation pressure keepings Mix 2～3h of reaction；After above-mentioned reaction terminates, reactor relief valve is opened, recover to normal pressure to take out reaction after pressure in kettle Product in kettle, with horizontal centrifuge with 2000～3000r/min rotating speed 15～20min of centrifugal treating, isolated lower sediment, Precipitation is put into into baking oven, 1～2h is dried at 105～110 DEG C, is obtained selfreparing filler, it is standby；Mulberry leaf are used after food steamer is cleaned Rebasing, tile on mulberry leaf glutinous rice, and laying depth is 2～3cm, after the completion of laying will food steamer move into steamer in steam 40～ 50min, takes out ripe glutinous rice after steaming end, moves it in bamboo sieve, moves in fermentation tank, press after which naturally cools to room temperature Inoculum concentration accesses Alkaliphilic bacillus for 10% on ripe glutinous rice, spontaneous fermentation 3～5 days at 30～40 DEG C, obtains fermentation and produces Thing；Count by weight, weigh 100～120 parts of cement, 50～60 parts of river sands, 10～20 parts of standby selfreparing fillers, 15～ 20 parts of tunnings obtained above, 3～5 parts of polyvinyl alcohol, 3～5 parts of flyash, rubbles of 200～300 part of 50 mesh and 150 ～200 parts of deionized waters are sequentially loaded in concrete mixer, 120 are stirred at 45～55 DEG C with 80～100r/min rotating speeds～ Discharge after 150s, obtain final product impervious self-repair concrete.

Example 1

Collect 200g rape petal pollens to be poured in the urea liquid that 2L mass fractions are 10%, with ultrasonic disperse instrument with 200W Power ultrasonic disperses 30min, obtains pollen suspension, then instills 250mL mass concentrations in above-mentioned pollen suspension for 1.0g/ L aqua calcises, continue stirring mixing 15min and obtain reactant liquor；Above-mentioned reactant liquor is moved in autoclave, in kettle Nitrogen is passed through with the speed of 3mL/s to reach 2.0MPa and be warming up to 75 DEG C up to pressure in kettle, starts reactor agitator, with 200r/min rotating speed heat-insulation pressure keeping stirring reactions 2h；After above-mentioned reaction terminates, reactor relief valve is opened, treats that pressure is extensive in kettle Product in reactor is taken out to normal pressure again, it is with horizontal centrifuge with 2000r/min rotating speed centrifugal treatings 15min, isolated Precipitation is put into baking oven by lower sediment, at 105 DEG C is dried 1h, obtains selfreparing filler, standby；Mulberry is used after food steamer is cleaned Knot bottom, tile on mulberry leaf glutinous rice, and laying depth is 2cm, moves into food steamer in steamer and steams 40min, steam after the completion of laying System takes out ripe glutinous rice after terminating, and moves it in bamboo sieve, moves in fermentation tank, by inoculum concentration be after which naturally cools to room temperature 10% accesses Alkaliphilic bacillus on ripe glutinous rice, and at 30 DEG C, spontaneous fermentation 3 days, obtain tunning；Count by weight, Weigh 100 parts of cement, 50 parts of river sands, 10 parts of standby selfreparing fillers, 15 parts of tunnings obtained above, 3 parts of polyethylene Alcohol, 3 parts of flyash, the rubble of 200 part of 50 mesh and 150 parts of deionized waters are sequentially loaded in concrete mixer, are turned with 80r/min Speed discharges after stirring 120s at 45 DEG C, obtains final product impervious self-repair concrete.

Impervious self-repair concrete obtained by the present invention is layed in into factories and mines road, laying depth is 12cm, is covered with Polypropylence Sheet Lid maintenance 2 days, then natural curing 28 days, obtain final product the road surface of concrete laying.After testing, maintenance of surface terminates rear impermeability pressure and carries High by 30%, mean compressive strength improves 15%, using 8 years, does not produce new crack and crack, and impervious effect is substantially, can be to mixed Solidifying soil cracking seam is voluntarily repaired.

Example 2

Collect 300g rape petal pollens to be poured in the urea liquid that 4L mass fractions are 15%, with ultrasonic disperse instrument with 300W Power ultrasonic disperses 50min, obtains pollen suspension, then instills 350mL mass concentrations in above-mentioned pollen suspension for 1.2g/ L aqua calcises, continue stirring mixing 20min and obtain reactant liquor；Above-mentioned reactant liquor is moved in autoclave, in kettle Nitrogen is passed through with the speed of 5mL/s to reach 2.3MPa and be warming up to 80 DEG C up to pressure in kettle, starts reactor agitator, with 300r/min rotating speed heat-insulation pressure keeping stirring reactions 3h；After above-mentioned reaction terminates, reactor relief valve is opened, treats that pressure is extensive in kettle Product in reactor is taken out to normal pressure again, it is with horizontal centrifuge with 3000r/min rotating speed centrifugal treatings 20min, isolated Precipitation is put into baking oven by lower sediment, at 110 DEG C is dried 2h, obtains selfreparing filler, standby；Mulberry is used after food steamer is cleaned Knot bottom, tile on mulberry leaf glutinous rice, and laying depth is 3cm, moves into food steamer in steamer and steams 50min, steam after the completion of laying System takes out ripe glutinous rice after terminating, and moves it in bamboo sieve, moves in fermentation tank, by inoculum concentration be after which naturally cools to room temperature 10% accesses Alkaliphilic bacillus on ripe glutinous rice, and at 40 DEG C, spontaneous fermentation 5 days, obtain tunning；Count by weight, Weigh 120 parts of cement, 60 parts of river sands, 20 parts of standby selfreparing fillers, 20 parts of tunnings obtained above, 5 parts of polyethylene Alcohol, 5 parts of flyash, the rubble of 300 part of 50 mesh and 200 parts of deionized waters are sequentially loaded in concrete mixer, with 100r/min Rotating speed discharges after stirring 150s at 55 DEG C, obtains final product impervious self-repair concrete.

Impervious self-repair concrete obtained by the present invention is layed in into factories and mines road, laying depth is 15cm, is covered with Polypropylence Sheet Lid maintenance 3 days, then natural curing 30 days, obtain final product the road surface of concrete laying.After testing, maintenance of surface terminates rear impermeability pressure and carries High by 35%, mean compressive strength improves 20%, using 9 years, does not produce new crack and crack, and impervious effect is substantially, can be to mixed Solidifying soil cracking seam is voluntarily repaired.

Example 3

Collect 250g rape petal pollens to be poured in the urea liquid that 3L mass fractions are 13%, with ultrasonic disperse instrument with 250W Power ultrasonic disperses 40min, obtains pollen suspension, then instills 300mL mass concentrations in above-mentioned pollen suspension for 1.1g/ L aqua calcises, continue stirring mixing 18min and obtain reactant liquor；Above-mentioned reactant liquor is moved in autoclave, in kettle Nitrogen is passed through with the speed of 4mL/s to reach 2.1MPa and be warming up to 78 DEG C up to pressure in kettle, starts reactor agitator, with 250r/min rotating speed heat-insulation pressure keeping stirring reactions 3h；After above-mentioned reaction terminates, reactor relief valve is opened, treats that pressure is extensive in kettle Product in reactor is taken out to normal pressure again, it is with horizontal centrifuge with 2500r/min rotating speed centrifugal treatings 18min, isolated Precipitation is put into baking oven by lower sediment, at 108 DEG C is dried 2h, obtains selfreparing filler, standby；Mulberry is used after food steamer is cleaned Knot bottom, tile on mulberry leaf glutinous rice, and laying depth is 3cm, moves into food steamer in steamer and steams 45min, steam after the completion of laying System takes out ripe glutinous rice after terminating, and moves it in bamboo sieve, moves in fermentation tank, by inoculum concentration be after which naturally cools to room temperature 10% accesses Alkaliphilic bacillus on ripe glutinous rice, and at 35 DEG C, spontaneous fermentation 4 days, obtain tunning；Count by weight, Weigh 110 parts of cement, 55 parts of river sands, 15 parts of standby selfreparing fillers, 18 parts of tunnings obtained above, 4 parts of polyethylene Alcohol, 4 parts of flyash, the rubble of 250 part of 50 mesh and 180 parts of deionized waters are sequentially loaded in concrete mixer, are turned with 90r/min Speed discharges after stirring 135s at 50 DEG C, obtains final product impervious self-repair concrete.

Impervious self-repair concrete obtained by the present invention is layed in into factories and mines road, laying depth is 17cm, is covered with Polypropylence Sheet Lid maintenance 3 days, then natural curing 29 days, obtain final product the road surface of concrete laying.After testing, maintenance of surface terminates rear impermeability pressure and carries High by 33%, mean compressive strength improves 18%, using 10 years, does not produce new crack and crack, and impervious effect is substantially, can be to mixed Solidifying soil cracking seam is voluntarily repaired.

Claims (1)

1. a kind of preparation method of impervious self-repair concrete, it is characterised in that concrete preparation process is：

（1）Collect 200～300g rape petal pollens to be poured in the urea liquid that 2～4L mass fractions are 10～15%, with super Sound separating apparatus disperse 30～50min with 200～300W power ultrasonics, obtain pollen suspension, then in above-mentioned pollen suspension It is 1.0～1.2g/L aqua calcises to instill 250～350mL mass concentrations, continues stirring 15～20min of mixing and is reacted Liquid；

（2）Above-mentioned reactant liquor is moved in autoclave, nitrogen is passed through with the speed of 3～5mL/s until kettle internal pressure in kettle Power reaches 2.0～2.3MPa and is warming up to 75～80 DEG C, starts reactor agitator, is protected with the insulation of 200～300r/min rotating speeds Pressure 2～3h of stirring reaction；

（3）After above-mentioned reaction terminates, reactor relief valve is opened, produced in pressure in kettle recovers to normal pressure to take out reactor Thing, with horizontal centrifuge with 2000～3000r/min rotating speed 15～20min of centrifugal treating, isolated lower sediment will precipitation Baking oven is put into, 1～2h is dried at 105～110 DEG C, is obtained selfreparing filler, it is standby；

（4）Rebasing with mulberry leaf after food steamer is cleaned, tile on mulberry leaf glutinous rice, and laying depth is 2～3cm, will after the completion of laying Food steamer steams 40～50min in moving into steamer, takes out ripe glutinous rice after steaming end, moves it in bamboo sieve, treats its natural cooling Move in fermentation tank to room temperature, access Alkaliphilic bacillus for 10% by inoculum concentration on ripe glutinous rice, it is natural at 30～40 DEG C Fermentation 3～5 days, obtains tunning；

（5）Count by weight, weigh 100～120 parts of cement, 50～60 parts of river sands, 10～20 parts of standby selfreparing fillers, 15～20 parts of tunnings obtained above, 3～5 parts of polyvinyl alcohol, 3～5 parts of flyash, the rubble of 200～300 part of 50 mesh and 150～200 parts of deionized waters are sequentially loaded in concrete mixer, are stirred at 45～55 DEG C with 80～100r/min rotating speeds Discharge after 120～150s, obtain final product impervious self-repair concrete.