CN104529328A - High-crack-resistant palm fiber self-compacting concrete - Google Patents
High-crack-resistant palm fiber self-compacting concrete Download PDFInfo
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- CN104529328A CN104529328A CN201410756637.3A CN201410756637A CN104529328A CN 104529328 A CN104529328 A CN 104529328A CN 201410756637 A CN201410756637 A CN 201410756637A CN 104529328 A CN104529328 A CN 104529328A
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Abstract
The invention discloses high-crack-resistant palm fiber self-compacting concrete. The high-crack-resistant palm fiber self-compacting concrete comprises cement, pulverized fuel ash, river sand, limestone, water, a water reducing agent and palm fibers, wherein the content of the cement is 320-380kg/m<3>; the content of the pulverized fuel ash is 170-230kg/m<3>; the content of the river sand is 780-860kg/m<3>; the content of the limestone is 920-980kg/m<3>; the content of the palm fibers is 0.6-1.5kg/m<3>; the content of water is 175-240kg/m<3>; the content of the water reducing agent is 10-12.5kg/m<3>. By virtue of the adoption of the design, the palm fibers are doped into the existing the concrete, so that the compressive strength, the splitting tensile strength and the crack resistance of the concrete are effectively improved; the integrated performance of the concrete is improved; meanwhile, the high-crack-resistant palm fiber self-compacting concrete is low in cost and has good market prospect and good popularization value.
Description
Technical field
The invention belongs to technical field of inorganic nonmetallic materials, be specifically related to a kind of novel monkey grass self-compacting concrete.
Background technology
As the material of construction that usage quantity is now maximum, there is tensile strength low ﹑ fragility shortcoming large and easy to crack in concrete, simultaneously owing to also limit the use of concrete in Modern New building structure from shortcomings such as great and needs vibrate.
At present, to generally believe that in concrete adding of fiber contributes to overcoming that concrete tensile strength is low, fragility is large and the defect such as easy to crack in the world; And the appearance of self-compacting concrete, efficiently solve intensive armored concrete constructional difficulties and needs and the shortcoming such as to vibrate.Fiber self-dense concrete has concentrated the advantage of fibrous concrete and self-compacting concrete.Introducing fiber in concrete material to make fibrous concrete material and can suppress distress in concrete, is one of effective measure improving the performances such as concrete tensile strength.Fiber conventional in current engineering is steel fiber and polypropylene fibre, but steel fiber price is more expensive, and polypropylene fibre has hydrophobic nature, bonds more weak with concrete substrate, and easy conglomeration disperse uneven, and price is more expensive, is considerably increased engineering cost.
Summary of the invention
In order to defects such as the tensile strength solving the existence of above-mentioned concrete are low, fragility is large and easy to crack, the present invention discloses a kind of high cracking resistance monkey grass self-compacting concrete, and the present invention adopts following technical scheme to solve above-mentioned technical problem:
A kind of high cracking resistance monkey grass self-compacting concrete, comprise cement, flyash, river sand, limestone, water and water reducer, also comprise monkey grass, wherein cement content is 320 ~ 380kg/m
3, fly ash content is 170 ~ 230kg/m
3, river sand content is 780 ~ 860kg/m
3, limestone content is 920 ~ 980kg/m
3, monkey grass content is 0.6 ~ 1.5kg/m
3, the content of water is 175 ~ 240kg/m
3, reduced water content is 10 ~ 12.5kg/m
3.
Preferably, in above-mentioned one high cracking resistance monkey grass self-compacting concrete, described monkey grass is through following steps process: being dipped in concentration is in the NaOH solution of 2.5%, at 50 DEG C, process 8h, extremely neutral by washed with de-ionized water after taking-up, be 60 DEG C of dry for standby at drying baker control temperature.
Preferably, in above-mentioned one high cracking resistance monkey grass self-compacting concrete, described cement to be strength grade be 42.5 silicate cement or ordinary Portland cement.
Preferably, in above-mentioned one high cracking resistance monkey grass self-compacting concrete, described river grain fineness number modulus is 2.4 ~ 3.2.
Preferably, in above-mentioned one high cracking resistance monkey grass self-compacting concrete, described limestone particle diameter is 5mm ~ 25mm.
Preferably, in above-mentioned one high cracking resistance monkey grass self-compacting concrete, described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
Adopt design of the present invention, in existing concrete, mix monkey grass, effectively raise concrete ultimate compression strength, split tensile strength, resistance to cleavage, improve concrete over-all properties, simultaneously with low cost, possess good market outlook and promotional value.
Embodiment
Below by embodiment, the present invention is further detailed explanation.Experiment adopts identical proportioning and the shaping 9 groups of concrete samples of moulding process, the 1st group for not add monkey grass control group, all the other 8 groups in testing.Untreated monkey grass physical and mechanical property is see table 1, and the monkey grass physical and mechanical property processed is see table 2.
The monkey grass physical and mechanical property that table 1 is untreated
The monkey grass physical and mechanical property that table 2 processed
Embodiment 1
A kind of each component proportion of high cracking resistance monkey grass self-compacting concrete is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 0kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.
Embodiment 2
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 0.6kg/m
3, water 200kg/m
3, water-cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is unprocessed.
Embodiment 3
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 0.6kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is treated.
Embodiment 4
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 1.2kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is unprocessed.
Embodiment 5
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 1.2kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is treated.
Embodiment 6
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 1.5kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is unprocessed.
Embodiment 7
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 1.5kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is treated.
Embodiment 8
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 2.0kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is unprocessed.
Embodiment 9
The concrete each component proportion of a kind of monkey grass is: cement 360kg/m
3, flyash 210kg/m
3, sand 820kg/m
3, stone 940kg/m
3, monkey grass 2.0kg/m
3, water 200kg/m
3, water cement ratio is 0.35, water reducer 10kg/m
3.Monkey grass is treated.
Above-described embodiment mention fiber treatment concrete grammar be:
Monkey grass being dipped in concentration is in the NaOH solution of 2.5%, at 50 DEG C, process 8h, extremely neutral by washed with de-ionized water after taking-up, be 60 DEG C of dry for standby at drying baker control temperature.
Above-described embodiment mechanical experimental results is as shown in table 3.
Table 3 mechanical performance of concrete test result
1, Analysis of The Working
The expansion degree that collapses as can be seen from Table 3 reduces along with the increase of fibers content, all meets the requirement of self-compacting concrete to serviceability, T simultaneously
50reduce along with the increase of fibers content, simultaneously little on the serviceability impact of process on self-compacting concrete of fiber.
2, Compressive Strength Analysis
As seen from Table 3: 1, in 2,4,6,8 groups, can find out the 7d of monkey grass self-compacting concrete, the ultimate compression strength of 28d is 0-1.5kg/m at monkey grass volume
3in scope, increase with the increase of fibers content, 6 groups and 8 groups relatively in, can find out when fibers content is 2.0kg/m
3time, resistant fiber Compressive Strength declines.Be 1.5kg/m at monkey grass volume
3time, the control group that the compressive strength rate of 28d does not mix fiber adds 22.67%.
3, the analysis of split tensile strength
1, in 2,4,6,8 groups, can find out the 7d of monkey grass self-compacting concrete, the ultimate compression strength of 28d is 0-1.2kg/m at monkey grass volume
3in scope, increase with the increase of fibers content, 1 group and 5 groups relatively in, monkey grass volume is 1.2-2.0kg/m
3in scope, reduce with the increase of fibers content.4, Fiber strength analysis
At 2 and 3,4 and 5,6 and 7 groups, 8 and 9 groups relatively in, when can find out identical monkey grass volume, to the ultimate compression strength after Fiber strength higher than untreated, be 1.5kg/m at volume
36,7 groups in compare discovery, untreated 8.6% is greater than to the 28d ultimate compression strength after fiber treatment.
At 2 and 3,4 and 5,6 and 7 groups, 8 and 9 groups relatively in, when can find out identical monkey grass volume, to the split tensile strength after the process of fiber surface higher than untreated.1.5kg/m is at volume
36,7 groups in compare discovery, untreated 7.6% is greater than to the 28d split tensile strength after fiber treatment.
The test of above-described embodiment resistance to cleavage is as shown in table 4.
Flaw area in table 4 concrete crack width and unit surface
Show that admixture monkey grass is very large to the effect reducing fracture width by the data of table 4, and incorporation is 1.5kg/m
3and 2.1kg/m
3the fracture width of concrete sample all control at below 0.08mm, being obviously better than volume is 0.6kg/m
3and 2.0kg/m
3test specimen; Be 1.5kg/m at fibers content
3the 6th group of fracture width compare with the 1st group of fracture width not mixing fiber, decrease 67.8%, therefore can find out monkey grass to control concrete fracture width effect clearly.
In concrete, mix monkey grass as shown in Table 4 split effect clearly to concrete resistance, can find out, volume is 1.5kg/m simultaneously
3concrete sample unit surface on flaw area be every square metre of 350mm
2left and right, compared with the 1st group that does not mix fiber, reduces about 45% than uncorporated. but along with the increase of fibers content, the controllability of test specimen fracture area starts to slow down.
Adopt design of the present invention, in existing concrete, mix monkey grass, effectively raise concrete ultimate compression strength, split tensile strength, resistance to cleavage, improve concrete over-all properties, simultaneously with low cost, possess good market outlook and promotional value.
Be only preferred embodiment of the present invention described in upper, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a high cracking resistance monkey grass self-compacting concrete, comprises cement, flyash, river sand, limestone, water and water reducer, it is characterized in that, also comprise monkey grass, and wherein cement content is 320 ~ 380kg/m
3, fly ash content is 170 ~ 230kg/m
3, river sand content is 780 ~ 860kg/m
3, limestone content is 920 ~ 980kg/m
3, monkey grass content is 0.6 ~ 1.5kg/m
3, the content of water is 175 ~ 240kg/m
3, reduced water content is 10 ~ 12.5kg/m
3.
2. one according to claim 1 high cracking resistance monkey grass self-compacting concrete, it is characterized in that: described monkey grass is through following steps process: being dipped in concentration is in the NaOH solution of 2.5%, 8h is processed at 50 DEG C, extremely neutral by washed with de-ionized water after taking-up, be 60 DEG C of dry for standby at drying baker control temperature.
3. one according to claim 1 and 2 high cracking resistance monkey grass self-compacting concrete, is characterized in that: described cement to be strength grade be 42.5 silicate cement or ordinary Portland cement.
4. one according to claim 1 and 2 high cracking resistance monkey grass self-compacting concrete, is characterized in that: described river grain fineness number modulus is 2.4 ~ 3.2.
5. one according to claim 1 and 2 high cracking resistance monkey grass self-compacting concrete, is characterized in that: described limestone particle diameter is 5mm ~ 25mm.
6. one according to claim 1 and 2 high cracking resistance monkey grass self-compacting concrete, is characterized in that: described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311575A (en) * | 2017-08-31 | 2017-11-03 | 福建省永泰建筑工程公司 | A kind of seismic structural wall, earthquake resistant wall rendering mortar |
| CN108840719A (en) * | 2018-09-11 | 2018-11-20 | 台山市河朗新型环保建材有限公司 | A kind of concrete brick and preparation method thereof that the anticorrosive service life is long |
| CN111517731A (en) * | 2020-06-28 | 2020-08-11 | 陕西汇丰高性能粉体材料有限公司 | C30 concrete and production process thereof |
| CN111606616A (en) * | 2020-05-20 | 2020-09-01 | 中铁二局第二工程有限公司 | Filling type plant fiber, preparation method and high-strength plastic wave-absorbing concrete |
| CN114686033A (en) * | 2022-04-27 | 2022-07-01 | 西安德润九州新材料有限公司 | Exterior wall waterproof putty powder and preparation method thereof |
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| CN102674791A (en) * | 2011-03-18 | 2012-09-19 | 棕纤环保科技有限公司 | Sheet material made of oil palm fibres and magnesium oxide and method for producing same |
| CN103864385A (en) * | 2014-02-26 | 2014-06-18 | 郑州大学 | Self-compacting concrete of fiber-reinforced polymer for assembly hollow plate bridge hinge joint |
| CN103862759A (en) * | 2014-03-04 | 2014-06-18 | 苏州大学 | Preparation method of palm fibril core and product thereof |
| WO2014094864A1 (en) * | 2012-12-20 | 2014-06-26 | Qim Projekt & Consult Gmbh | Building material composition for producing a lightweight concrete |
| CN104030638A (en) * | 2014-06-16 | 2014-09-10 | 西南交通大学 | Rubber elastic self-compaction concrete for plate-type ballastless tracks |
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| CN102674791A (en) * | 2011-03-18 | 2012-09-19 | 棕纤环保科技有限公司 | Sheet material made of oil palm fibres and magnesium oxide and method for producing same |
| WO2014094864A1 (en) * | 2012-12-20 | 2014-06-26 | Qim Projekt & Consult Gmbh | Building material composition for producing a lightweight concrete |
| CN103864385A (en) * | 2014-02-26 | 2014-06-18 | 郑州大学 | Self-compacting concrete of fiber-reinforced polymer for assembly hollow plate bridge hinge joint |
| CN103862759A (en) * | 2014-03-04 | 2014-06-18 | 苏州大学 | Preparation method of palm fibril core and product thereof |
| CN104030638A (en) * | 2014-06-16 | 2014-09-10 | 西南交通大学 | Rubber elastic self-compaction concrete for plate-type ballastless tracks |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311575A (en) * | 2017-08-31 | 2017-11-03 | 福建省永泰建筑工程公司 | A kind of seismic structural wall, earthquake resistant wall rendering mortar |
| CN107311575B (en) * | 2017-08-31 | 2020-06-05 | 福建省永泰建筑工程公司 | Mortar for plastering anti-seismic wall |
| CN108840719A (en) * | 2018-09-11 | 2018-11-20 | 台山市河朗新型环保建材有限公司 | A kind of concrete brick and preparation method thereof that the anticorrosive service life is long |
| CN111606616A (en) * | 2020-05-20 | 2020-09-01 | 中铁二局第二工程有限公司 | Filling type plant fiber, preparation method and high-strength plastic wave-absorbing concrete |
| CN111517731A (en) * | 2020-06-28 | 2020-08-11 | 陕西汇丰高性能粉体材料有限公司 | C30 concrete and production process thereof |
| CN114686033A (en) * | 2022-04-27 | 2022-07-01 | 西安德润九州新材料有限公司 | Exterior wall waterproof putty powder and preparation method thereof |
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Application publication date: 20150422 |
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