CN105236841A - Reactive powder concrete doped with granite powder and preparation method thereof - Google Patents
Reactive powder concrete doped with granite powder and preparation method thereof Download PDFInfo
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- CN105236841A CN105236841A CN201510526726.3A CN201510526726A CN105236841A CN 105236841 A CN105236841 A CN 105236841A CN 201510526726 A CN201510526726 A CN 201510526726A CN 105236841 A CN105236841 A CN 105236841A
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Abstract
The invention provides a reactive powder concrete doped with granite powder and a preparation method thereof, belonging to building materials. The reactive powder concrete doped with the granite powder is prepared from raw materials of cement, silicon ash, a water reducing agent, river sand, water and the granite powder. The method comprises the following steps: uniformly spreading the granite powder in a tray, then placing the tray in an oven and carrying out drying and sieving, and removing impurities in the granite powder; cleaning a test mold, removing debris inside the test mold, coating the inner surface of the test mold with a layer of machine oil and a layer of a mold release agent; pouring the cement, the silicon ash, the river sand and the granite powder into a mixer, and carrying out dry mixing; then adding the water dissolved with the water reducing agent, and carrying out stirring; pouring the obtained product in the test mold, then placing the test mold on a vibrating table, carrying out vibration until the surface of the test mold emerges slurry, then carrying out stopping, and cutting excess concrete with a spatula until the surface of the test mold is smoothed; and carrying out standing and demolding, then transferring a demolded test specimen into an autoclave and carrying out autoclave curing, and after autoclave curing is completed, carrying out transferring into a standard curing room and carrying out curing until a specified age of concrete is achieved so as to obtain the reactive powder concrete doped with the granite powder.
Description
Technical field
The invention belongs to building material technical field, relate to concrete, especially relate to a kind of RPC of mixing granite stone powder and preparation method thereof.
Background technology
RPC (ReactivePowderConcrete is called for short RPC) is that a kind of superelevation is strong, high tenacity, weather resistance are strong and the cement-base composite material of good volume stability.The starting material of RPC mineral material that is tiny primarily of particle, that have certain activity forms.In RPC, active ingredient mainly contains silicon ash, silica powder, and silicon ash is all higher with the volume of silica powder, and in addition, in RPC, the volume of cement is very high, such that the preparation cost of RPC is high, energy consumption is large.Because its preparation cost is high, the waste material replacing partial cements such as steel-making slag powder, superfined flyash, ultrafine slag, rice hull ash and silicon ash are mainly used in research both domestic and external, reduce costs, energy consumption prepares RPC.And Fujian is stone material big producing province; the a large amount of stone flour of annual generation; contaminate environment; and talc particles is tiny, at high temperature have certain activity; if by the preparation of stone flour Substitute For Partial gelling material (cement, silicon ash) for RPC; not only can reduce RPC cost, and can also economize on resources, protection of the environment.In the middle of present existing engineering, such as: seat of honour RPC People's Bank of China/vehicle bridge was voluntarily built in 1997 in Quebec, Canada.2000, having built up the Xianyou bridge of a span 120m in Seoul, South Korea (now claiming Soul) Han River, is the arch bridge that the seat of honour adopts RPC construction.These are all the application of RPC in engineering, according to the preparation of granite stone powder Substitute For Partial gelling material (cement, silicon ash) for RPC, then effectively can reduce preparation cost and the energy consumption of RPC, and can efficent use of resources, be beneficial to environmental protection.
A kind of RPC of mixing super-active slag powder that Chinese patent CN103172322A applies for and preparation method thereof, in the patent of its application, the main raw material(s) of RPC has cement, silicon ash, silica powder, sand, water, water reducer and steel fiber, super-active slag powder.
The a kind of of Chinese patent CN103172323A application mixes RPC of ultra-fine simple glass powder and preparation method thereof, in the patent of its application, the main raw material(s) of RPC has cement, silicon ash, silica powder, sand, water, water reducer and steel fiber, ultra-fine simple glass powder.
RPC ultimate compression strength under normal pressure heat curing condition that above-mentioned two patents prepare reaches 260 ~ 300MPa, but, new adulterant is introduced in its proportioning---super-active slag powder, ultra-fine simple glass powder, add the cost of RPC.
Innovation of the present invention is to adopt discarded granite stone powder part to replace the preparation of the gelling material (cement, silicon ash) in RPC for RPC, the ultimate compression strength of RPC can be significantly increased under certain Replacement rate, namely the production cost that effectively can reduce RPC is mixed in granite stone powder, economize on resources the energy, and have higher environmental benefit.
Summary of the invention
The object of the present invention is to provide one can improve intensity, improving performance, energy-conserving and environment-protective, RPC of mixing granite stone powder reduced costs and preparation method thereof.
The object of the invention is to realize by the following technical solutions:
Described a kind of RPC of mixing granite stone powder, be that raw material is prepared from by cement, silicon ash, water reducer, river sand, water and granite stone powder, its formula is as follows: in mass ratio, cement: silicon ash: sand=1, river: (0.21 ~ 0.31): (1.00 ~ 1.2), the content of water is 0.16 ~ 0.22 (water-cement ratio) of the total mass of cement and silicon ash; By mass percentage, the content of water reducer is 2% ~ 3% of cement quality, and the content of granite stone powder is 5% ~ 20% of cement and silicon ash total mass.
Further: described cement is P.O525 normal concrete silicate cement, specific surface area 361m
2/ kg, loss on ignition 2.34%; Silicon ash, SiO
2content>=90%, particle diameter is 0.1 ~ 0.2um, median size d
sFfor 0.162um, apparent density ρ
sFfor 2293kg/m
3; River sand apparent density is 2270kg/m
3; Water reducer is the CX-8 polycarboxylate water-reducer of water-reducing rate 25%; Granite stone powder specific surface area is 588m
2/ kg, loss on ignition is 0.72%, and density is 2760kg/m
3.
Described a kind of preparation method mixing the RPC of granite stone powder, comprises the following steps:
1) granite stone powder is paved in dish evenly, put into baking oven and dry;
In step 1) in, the temperature of described oven dry can be 60 DEG C, and the time of oven dry can be 12h.
2) granite stone powder after drying is carried out sieving, remove wherein impurity, the granite stone powder particle diameter after screening is below 100 μm;
3) clear up die trial, remove the foreign material in die trial, then after the internal surface of die trial is coated with one deck machine oil, be coated with last layer releasing agent again, with conveniently stripped rear cleaning;
4) cement, silicon ash, river sand, granite stone powder are weighed in proportion, pour in stirrer, dry mixing; Then add the water being dissolved with water reducer, stir;
In step 4) in, the time of described dry mixing can be 3min, and described stirring first adds the half ratio water gaging being dissolved with water reducer, stirs 2min, then adds second half ratio water gaging being dissolved with water reducer, then stir 2 ~ 3min;
5) by step 4) products therefrom is cast in die trial, is placed on shaking table and vibrates, until stop after surperficial pulp, then to prune unnecessary concrete by floating for its surface after 1h with spatula;
In step 5) in, the time of described vibration can be 4min; Described die trial can be 40mm × 40mm × 160mm tri-gang mould.
6) form removal after standing 24h, test specimen after form removal proceeds in autoclave and carries out steam press maintenance, standard curing room (temperature is the humidity room of (20 ± 2) DEG C) is proceeded to after steam press maintenance, maintenance, to specifying the length of time, obtains described a kind of RPC of mixing granite stone powder.
In step 6) in, the processing condition of described steam press maintenance are: vacuumize 0.5h, increasing temperature and pressure 1h, constant temperature and pressure 6h, step-down 2h, and thermostat temperature is 190 ~ 200 DEG C, and constant-pressure pressure is 1.2MPa.
Compared with prior art, beneficial effect of the present invention is as follows:
Granite stone powder is mixed with in starting material due to production RPC, intensity due to RPC itself depends on superposing of raw-material activity and micro aggregate effect, and through pretreated granite stone powder on particle diameter between cement and river sand, therefore the micro aggregate effect that can play himself of granite stone powder in active concrete, make RPC more closely knit, thus reach the intensity improving RPC, adopt the gelling material (cement in discarded granite stone powder part replacement RPC, silicon ash) for the preparation of RPC, the ultimate compression strength of RPC can be significantly increased under certain Replacement rate, namely the production cost that effectively can reduce RPC is mixed in granite stone powder, economize on resources the energy, and there is higher environmental benefit.
The present invention makes full use of the waste material of processing granite building material, reduces the consumption of cement and silicon ash, economizes on resources, and reduces energy consumption cost, alleviates the pollution of granite stone powder to environment, have good economic benefit and social benefit.
Embodiment
Below in conjunction with embodiment, the present invention is further described specifically.
Starting material:
(1) cement
Test water mud is the P.O525 normal concrete silicate cement that Fujian refining Stone steles Cement Co., Ltd produces, and each component concentration of cement is as table 1, and the performance index of cement are as table 2.
The each component concentration of table 1 cement (%)
The performance index of table 2 cement
(2) silicon ash
The silicon ash that Xining ferroalloy works produce, SiO
2content>=90%, particle diameter is 0.1 ~ 0.2um, median size d
sFfor 0.162um, apparent density ρ
sFfor 2293kg/m
3.The fundamental performance parameter of silicon ash is in table 3.
Table 3 silicon ash fundamental performance parameter
(3) river sand
Sand is river, Min River sand, and apparent density is 2270kg/m
3, grating distribution is in table 4
Grating distribution (%) of table 4 sand
(4) water reducer
Foochow Chuan Xian engineering materials company limited CX-8 polycarboxylate water-reducer, water-reducing rate 25%
(5) water
Water is tap water
(6) granite stone powder
Granite stone powder specific surface area is 588m
2/ kg, loss on ignition is 0.72%, and density is 2760kg/m
3.
Embodiment 1
Adopt RPC prepared by benchmark proportioning, proportioning is as shown in table 5.
Table 5 RPC proportioning
Water-cement ratio is 0.16; Sand-binder ratio 0.9; Water reducer consumption is 2.5% of cement;
Preparation method is: cement, silicon ash, river sand are weighed according to proportioning, pour in stirrer, dry mixing 3min; Add the half water being dissolved with water reducer, stir 2min; Finally add second half water being dissolved with water reducer, stir 2-3min; Recording degree of mobilization is 126mm; Mixture is poured into a mould in 40mm × 40mm × 160mm tri-gang mould, vibrate 4min on a vibration table.Test material preparation completes form removal after standing 24h, proceeds in autoclave and carry out steam press maintenance after form removal.Steaming pressuring curing system is, vacuumizes 0.5h, increasing temperature and pressure 1h, constant temperature and pressure 6h, step-down 2h, and thermostat temperature is 190 ~ 200 DEG C, and constant-pressure pressure is 1.2MPa.After maintenance completes, carry out compression tests to test block, the RPC ultimate compression strength finally recorded is 126.19MPa.
Embodiment 2
The gelling material (cement and silicon ash) adopting granite stone powder to replace 5% prepares RPC, and proportioning is as shown in table 6.
Table 6 RPC proportioning
Water-cement ratio is 0.16; Sand-binder ratio 0.9; Water reducer consumption is 2.5% of cement;
Preparation method is: cement, silicon ash, river sand and granite stone powder are weighed according to proportioning, pour in stirrer, dry mixing 3min; Add the half water being dissolved with water reducer, stir 2min; Finally add second half water being dissolved with water reducer, stir 2-3min; Recording degree of mobilization is 121mm; Mixture is poured into a mould in 40mm × 40mm × 160mm tri-gang mould, vibrate 4min on a vibration table.Test material preparation completes form removal after standing 24h, proceeds in autoclave and carry out steam press maintenance after form removal.Steaming pressuring curing system is, vacuumizes 0.5h, increasing temperature and pressure 1h, constant temperature and pressure 6h, step-down 2h, and thermostat temperature is 190 ~ 200 DEG C, and constant-pressure pressure is 1.2MPa.After maintenance completes, carry out compression tests to test block, the RPC ultimate compression strength finally recorded is 131.17MPa.
Embodiment 3
The gelling material (cement and silicon ash) adopting granite stone powder to replace 10% prepares RPC, and proportioning is as shown in table 7.
Table 7 RPC proportioning
Water-cement ratio is 0.16; Sand-binder ratio 0.9; Water reducer consumption is 2.5% of cement;
Preparation method is: cement, silicon ash, river sand and granite stone powder are weighed according to proportioning, pour in stirrer, dry mixing 3min; Add the half water being dissolved with water reducer, stir 2min; Finally add second half water being dissolved with water reducer, stir 2-3min; Recording degree of mobilization is 109mm; Mixture is poured into a mould in 40mm × 40mm × 160mm tri-gang mould, vibrate 4min on a vibration table.Test material preparation completes form removal after standing 24h, proceeds in autoclave and carry out steam press maintenance after form removal.Steaming pressuring curing system is, vacuumizes 0.5h, increasing temperature and pressure 1h, constant temperature and pressure 6h, step-down 2h, and thermostat temperature is 190 ~ 200 DEG C, and constant-pressure pressure is 1.2MPa.After maintenance completes, carry out compression tests to test block, the RPC ultimate compression strength finally recorded is 139.29MPa.
Embodiment 4
The gelling material (cement and silicon ash) adopting granite stone powder to replace 20% prepares RPC, and proportioning is as shown in table 8.
Table 8 RPC proportioning
Water-cement ratio is 0.16; Sand-binder ratio 0.9; Water reducer consumption is 2.5% of cement;
Preparation method, for cement, silicon ash, river sand and granite stone powder being weighed according to proportioning, pours in stirrer, dry mixing 3min; Add the half water being dissolved with water reducer, stir 2min; Finally add second half water being dissolved with water reducer, stir 2 ~ 3min; Recording degree of mobilization is 96mm; Mixture is poured into a mould in 40mm × 40mm × 160mm tri-gang mould, vibrate 4min on a vibration table.Test material preparation completes form removal after standing 24h, proceeds in autoclave and carry out steam press maintenance after form removal.Steaming pressuring curing system is, vacuumizes 0.5h, increasing temperature and pressure 1h, constant temperature and pressure 6h, step-down 2h, and thermostat temperature is 190 ~ 200 DEG C, and constant-pressure pressure is 1.2MPa.After maintenance completes, carry out compression tests to test block, the RPC ultimate compression strength finally recorded is 125.34MPa.
Embodiment 5
The gelling material (cement and silicon ash) adopting granite stone powder to replace 5% prepares RPC, and proportioning is as shown in table 9.
Table 9 RPC proportioning
Water-cement ratio is 0.18; Sand-binder ratio 0.9; Water reducer consumption is 3% of cement;
Described in the present embodiment 5, a kind of preparation method mixing the RPC of granite stone powder, identical with example 4, and the RPC degree of mobilization finally recorded is 135mm.The RPC ultimate compression strength finally recorded is 120.26MPa.
Embodiment 6
The gelling material (cement and silicon ash) adopting granite stone powder to replace 5% prepares RPC, and proportioning is as shown in table 10.
Table 10 RPC proportioning
Water-cement ratio is 0.22; Sand-binder ratio 0.9; Water reducer consumption is 2% of cement;
Described in the present embodiment 6, a kind of preparation method mixing the RPC of granite stone powder, identical with example 4, and the RPC degree of mobilization finally recorded is 141mm, and the RPC ultimate compression strength finally recorded is 96.35MPa.
From above-described embodiment, granite stone powder partly can replace the gelling material (cement in RPC, silicon ash) for the preparation of RPC, finally RPC of mixing granite stone powder of the present invention is when the ratio that granite stone powder replaces gelling material reaches 20%, ultimate compression strength and the benchmark proportioning of RPC are very nearly the same, ultimate compression strength is 125.34MPa, and when Replacement rate is within 10%, the ultimate compression strength of RPC is significantly increased, ultimate compression strength improves 9.4% compared with not replacing.
Above-described embodiment describes to better allow the personnel of this technical field understand and apply the invention.All do according to the present invention change or change, the functional effect produced all does not exceed scope of the present invention, is still in protection scope of the present invention.Special instruction: because steel fiber is mainly larger on the impact of its folding strength in RPC; although have impact to ultimate compression strength; but do not affect the reaction mechanism of not mixing steel fiber in starting material of the present invention; and the present invention is intended to illustrate that granite stone powder can replace the gelling material (cement, silicon ash) in RPC starting material; so based on basis of the present invention, in starting material, add the invention of steel fiber also in protection scope of the present invention.
Claims (9)
1. mix the RPC of granite stone powder for one kind, it is characterized in that, be that raw material is prepared from by cement, silicon ash, water reducer, river sand, water and granite stone powder, its formula is as follows: in mass ratio, cement: silicon ash: sand=1, river: (0.21 ~ 0.31): (1.00 ~ 1.2), the content of water is 0.16 ~ 0.22 (water-cement ratio) of the total mass of cement and silicon ash; By mass percentage, the content of water reducer is 2% ~ 3% of cement quality, and the content of granite stone powder is 5% ~ 20% of cement and silicon ash total mass.
2. a kind of RPC of mixing granite stone powder as claimed in claim 1, it is characterized in that, described cement is P.O525 normal concrete silicate cement, specific surface area 361m
2/ kg, loss on ignition 2.34%; The SiO of described silicon ash
2content>=90%, particle diameter is 0.1 ~ 0.2um, median size d
sFfor 0.162um, apparent density ρ
sFfor 2293kg/m
3; Described river sand apparent density is 2270kg/m
3; Described water reducer is the CX-8 polycarboxylate water-reducer of water-reducing rate 25%; Described granite stone powder specific surface area is 588m
2/ kg, loss on ignition is 0.72%, and density is 2760kg/m
3.
3. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 1, is characterized in that, comprise the following steps:
1) granite stone powder is paved in dish evenly, put into baking oven and dry;
2) granite stone powder after drying is carried out sieving, remove wherein impurity, the granite stone powder particle diameter after screening is below 100 μm;
3) clear up die trial, remove the foreign material in die trial, then after the internal surface of die trial is coated with one deck machine oil, be coated with last layer releasing agent again, with conveniently stripped rear cleaning;
4) cement, silicon ash, river sand, granite stone powder are weighed in proportion, pour in stirrer, dry mixing; Then add the water being dissolved with water reducer, stir;
5) by step 4) products therefrom is cast in die trial, is placed on shaking table and vibrates, until stop after surperficial pulp, then to prune unnecessary concrete by floating for its surface after 1h with spatula;
6) form removal after standing 24h, the test specimen after form removal proceeds in autoclave and carries out steam press maintenance, proceeds to curing room after steam press maintenance, and maintenance, to specifying the length of time, obtains described a kind of RPC of mixing granite stone powder.
4. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 3, is characterized in that, step 1) in, the temperature of described oven dry is 60 DEG C, and the time of oven dry is 12h.
5. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 3, it is characterized in that, step 4) in, the time of described dry mixing is 3min, described stirring first adds the half ratio water gaging being dissolved with water reducer, stir 2min, then add second half ratio water gaging being dissolved with water reducer, then stir 2 ~ 3min.
6. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 3, is characterized in that, step 5) in, the time of described vibration is 4min.
7. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 3, is characterized in that, step 5) in, described die trial is 40mm × 40mm × 160mm tri-gang mould.
8. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 3, it is characterized in that, step 6) in, the processing condition of described steam press maintenance are: vacuumize 0.5h, increasing temperature and pressure 1h, constant temperature and pressure 6h, step-down 2h, thermostat temperature is 190 ~ 200 DEG C, and constant-pressure pressure is 1.2MPa.
9. a kind of preparation method mixing the RPC of granite stone powder as claimed in claim 3, is characterized in that, step 6) in, described curing room adopts temperature to be the humidity room of 20 ± 2 DEG C.
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Cited By (7)
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| CN106517939A (en) * | 2016-10-27 | 2017-03-22 | 济南大学 | C50-grade granite-based composite micro powder concrete, and preparation method thereof |
| KR101755626B1 (en) | 2016-07-25 | 2017-07-10 | 이은숙 | Method of manufacturing a solidifying agent with granite sludge and eco-friendly resin |
| CN110281367A (en) * | 2019-07-26 | 2019-09-27 | 衡水积土科技有限公司 | A kind of concrete curing device and method |
| CN110803906A (en) * | 2019-11-28 | 2020-02-18 | 广州市北二环交通科技有限公司 | Ultrahigh-performance repair concrete based on sulphoaluminate-portland cement system |
| CN112479649A (en) * | 2020-11-18 | 2021-03-12 | 湖南大学 | Granite waste residue powder and silica fume synergistic modified recycled aggregate concrete and preparation method thereof |
| CN113149559A (en) * | 2021-04-26 | 2021-07-23 | 武汉理工大学 | Inert micro-powder concrete and preparation method thereof |
| CN113248202A (en) * | 2021-05-17 | 2021-08-13 | 北华大学 | Cement-based recycled concrete |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101755626B1 (en) | 2016-07-25 | 2017-07-10 | 이은숙 | Method of manufacturing a solidifying agent with granite sludge and eco-friendly resin |
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| CN110803906A (en) * | 2019-11-28 | 2020-02-18 | 广州市北二环交通科技有限公司 | Ultrahigh-performance repair concrete based on sulphoaluminate-portland cement system |
| CN112479649A (en) * | 2020-11-18 | 2021-03-12 | 湖南大学 | Granite waste residue powder and silica fume synergistic modified recycled aggregate concrete and preparation method thereof |
| CN113149559A (en) * | 2021-04-26 | 2021-07-23 | 武汉理工大学 | Inert micro-powder concrete and preparation method thereof |
| CN113248202A (en) * | 2021-05-17 | 2021-08-13 | 北华大学 | Cement-based recycled concrete |
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Address after: Fang Zhong Road, Huli District of Xiamen city in Fujian province 361009 2368 11 floor (Jinshan wealth Plaza Building 4) Applicant after: Cheng Cheng Engineering Consulting Group Limited by Share Ltd Applicant after: Xiamen He Cheng engineering company limited Address before: Fang Zhong Road, Huli District of Xiamen city in Fujian province 361009 2368 11 floor (Jinshan wealth Plaza Building 4) Applicant before: HECHENG ENGINEERING CONSULTATION CO., LTD. Applicant before: Xiamen He Cheng engineering company limited |
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Application publication date: 20160113 |
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