CN1257846A - Low-elasticity-modulus lean mix concrete and its preparing process - Google Patents
Low-elasticity-modulus lean mix concrete and its preparing process Download PDFInfo
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- CN1257846A CN1257846A CN 98126155 CN98126155A CN1257846A CN 1257846 A CN1257846 A CN 1257846A CN 98126155 CN98126155 CN 98126155 CN 98126155 A CN98126155 A CN 98126155A CN 1257846 A CN1257846 A CN 1257846A
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- 239000004567 concrete Substances 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims 2
- 239000000463 material Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 11
- 239000004566 building material Substances 0.000 abstract description 6
- 239000011343 solid material Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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Abstract
本发明涉及一种建筑材料及其制作方法,它由水、灰、骨料依一定重量比例混合搅拌;低弹模低灰混凝土是一种新型的建筑材料,具有含水量、骨料量高,弹性模量低、凝结速度快、造价低等优点。可应用于水工、矿山、道桥工程中的地下或水下工程和地上临时工程。该材料与普通水泥混凝土相比,抗折强度具有相同的量级,弹性模量低两个数量级。与高水速凝材料相比,抗压、抗折强度提高20%以上,制备相同体积的固体材料用灰料重量降低30%—50%。
The invention relates to a building material and a production method thereof, which is mixed and stirred by water, ash and aggregate according to a certain weight ratio; low-elastic-modulus low-ash concrete is a new type of building material, which has high water content and high aggregate content, It has the advantages of low elastic modulus, fast setting speed and low cost. It can be applied to underground or underwater projects and temporary projects on the ground in hydraulic engineering, mines, road and bridge projects. Compared with ordinary cement concrete, the material has the same level of flexural strength and two orders of magnitude lower elastic modulus. Compared with high-water quick-setting materials, the compressive and flexural strengths are increased by more than 20%, and the weight of ash used to prepare the same volume of solid materials is reduced by 30%-50%.
Description
本发明涉及一种建筑材料及其制法，尤其是指一种低弹模低灰混凝土及其制作方法。The invention relates to a building material and its preparation method, in particular to a low-elastic-modulus low-ash concrete and its preparation method.
与低弹模低灰混凝土相关的材料是各类水泥混凝土和高水速凝材料。水泥混凝土是建筑材料中最为常见的，有关资料可从建筑工程材料的书籍中查到。有关高水速凝材料可参阅孙恒虎、宋存义著的《高水速凝材料及其应用》一书及专利技术“金属矿山全尾砂速凝固化胶结充填新工艺”。The materials related to low elastic modulus and low ash concrete are various cement concrete and high water quick-setting materials. Cement concrete is the most common building material, and relevant information can be found in books on building engineering materials. For high-water quick-setting materials, please refer to the book "High-water quick-setting materials and their applications" written by Sun Henghu and Song Cunyi and the patented technology "New technology for quick-setting, solidification, cementation and filling of full tailings in metal mines".
高水速凝材料，也称高水速凝充填材料，具有凝结速度快(20分钟初凝，2小时可达1Mpa，7天后达到最终强度4-5Mpa)，含水量高(水、灰比2.5∶1)的特点。High water quick-setting material, also known as high-water quick-setting filling material, has fast setting speed (initial setting in 20 minutes, up to 1Mpa in 2 hours, and final strength of 4-5Mpa in 7 days), high water content (water-cement ratio 2.5 : 1) Features.
高水速凝充填材料的灰剂是一种成批生产的产品。主要应用于煤矿巷道支护材料和金属矿山充填料的固化剂。作为煤矿巷道支护材料，由于高水材料含灰量高，造价高，难以大范围推广应用。作为金属矿山充填料的固化剂，是将高水材料与金属全尾矿砂混合使用，材料7天抗压强度2.25-4Mpa，低于高水材料本身的强度，材料强度的均匀性也较差，仅仅适合于作为充填材料，也没有证据说明该充填材料具有抗折性能可以在其它方面的使用。Ash agent for high water quick-setting filling materials is a mass-produced product. It is mainly used as a curing agent for coal mine roadway support materials and metal mine filling materials. As coal mine roadway support materials, due to the high ash content and high cost of high-water materials, it is difficult to popularize and apply them on a large scale. As a curing agent for metal mine filling materials, high-water materials are mixed with metal tailings. The 7-day compressive strength of the material is 2.25-4Mpa, which is lower than the strength of the high-water material itself, and the uniformity of the material strength is also poor. It is only suitable as a filling material, and there is no evidence that the filling material has bending resistance and can be used in other fields.
在水工、矿山、铁路公路建设中，如防渗墙、弹性地基板等工程，人们更需要建筑材料有一定的韧性，即弹性模量比水泥混凝土更低些，同时，希望材料的造价更低些。水泥混凝土弹性模量高，易折断，高水速凝材料单位体积的含灰量较高，造价也较高。In the construction of hydraulic engineering, mines, railways and highways, such as anti-seepage walls, elastic ground plates and other projects, people need more toughness of building materials, that is, the elastic modulus is lower than that of cement concrete. At the same time, it is hoped that the cost of materials will be lower. lower. Cement concrete has a high modulus of elasticity and is easy to break. The high-water quick-setting material has a high ash content per unit volume and a high cost.
本发明的目的在于提出一种由灰、水、骨料按重量配比组成的低弹模低灰混凝土及其制法，它具有一定的抗压、抗折强度且含灰量大幅度下降的特点，从而解决了现有技术所存在的问题。The purpose of the present invention is to propose a low elastic modulus low ash concrete which is composed of ash, water and aggregate by weight ratio and its preparation method. It has certain compressive and flexural strength and the ash content is greatly reduced. characteristics, thereby solving the problems existing in the prior art.
本发明所采用的技术方案在于它以水、灰、骨料按比例混合搅拌浇注凝固而成，所说的灰、水、骨料重量比是在1∶2.5-3∶5-11范围；它的制作步骤包括有：The technical scheme adopted in the present invention is that it is formed by mixing, stirring, pouring and solidifying water, ash and aggregate in proportion, and the weight ratio of said ash, water and aggregate is in the range of 1: 2.5-3: 5-11; it The production steps include:
a)将甲料、乙料分别与5℃以上的水、骨料，依重量比混合搅拌，形成甲料混合剂、乙料混合剂；a) Mix and stir material A and material B with water and aggregate above 5°C respectively according to the weight ratio to form material A mixture and material B mixture;
b)将甲料混合剂、乙料混合剂混合，然后注入模板内或工程需要的地段；b) Mix the mixture of material A and material B, and then inject it into the formwork or the site required by the project;
c)将浇注后的材料振动液化c) Vibrating and liquefying the poured material
d)30分钟内材料凝固，7天后材料达到最终强度。d) The material solidifies within 30 minutes and reaches its final strength after 7 days.
低弹模低灰混凝土材料是一种新的建筑材料，具有含水量、骨料量高，含灰量低，弹性模量低，凝结速度快、造价低的优点。可应用于水工、矿山、铁路、公路建设中的地下或水下工程。由于其特殊的物理、力学特性，在其应用范围内比高水速凝材料和普通水泥混凝土有着更高的应用价值。Low elastic modulus low ash concrete material is a new building material, which has the advantages of high water content, high aggregate content, low ash content, low elastic modulus, fast setting speed and low cost. It can be applied to underground or underwater projects in hydraulic engineering, mines, railways, and highway construction. Due to its special physical and mechanical properties, it has higher application value than high-water quick-setting materials and ordinary cement concrete in its application range.
本发明的低弹模、低灰混凝土是将高水材料作为基料与工业砂(河砂、海砂)、块石或煤矸石等骨料按一定的方式和比例混合，经过均匀搅拌后成型，并在材料凝固前做液化处理。形成的材料不仅保留了高水速凝材料弹模低、凝结速度快的优点，并且其抗压、抗折强度有所提高，单位体积含灰量有大幅度下降，从而可节约成本。The low elastic modulus and low ash concrete of the present invention is formed by mixing high-water materials as base materials with aggregates such as industrial sand (river sand, sea sand), block stones or coal gangue in a certain manner and proportion, and then uniformly stirred , and do liquefaction before the material solidifies. The formed material not only retains the advantages of low elastic modulus and fast setting speed of high-water quick-setting materials, but also improves its compressive and flexural strength, and greatly reduces the ash content per unit volume, thereby saving costs.
双低(低弹模、低灰)混凝土与水泥混凝土相比，有相同量级的抗折强度(双低材料1-2Mpa，普通水泥混凝土6Mpa)，弹性模量差两个数量级，即双低混凝土是水泥混凝土的百分之一。双低混凝土与高水速凝材料相比，单位体积成品材料所用灰量减少，抗压、抗折强度提高。Compared with cement concrete, double low (low elastic modulus, low ash) concrete has the same magnitude of flexural strength (double low material 1-2Mpa, ordinary cement concrete 6Mpa), and the elastic modulus difference is two orders of magnitude, that is, double low Concrete is one percent of cement concrete. Compared with high-water quick-setting materials, double-low concrete uses less ash per unit volume of finished materials, and improves compressive and flexural strength.
图1为本发明制作方法的方框图。Fig. 1 is a block diagram of the manufacturing method of the present invention.
图2为本发明的应力与应变的曲线关系图。Fig. 2 is a curve relationship diagram of stress and strain in the present invention.
现在结合附图来进一步说明本发明的较佳具体实施例：Now further illustrate preferred embodiment of the present invention in conjunction with accompanying drawing:
1.按灰、水、骨料1∶3∶9的配比称取甲料(灰)50克、20±2℃的自来水450克、标准砂1350克倒于一搅拌桶里；1. Weigh 50 grams of material A (ash), 450 grams of tap water at 20±2°C, and 1350 grams of standard sand according to the ratio of ash, water and aggregate 1:3:9 and pour them into a mixing bucket;
2.称取乙料(灰)150克、水450克、标准砂1350克倒至另一搅拌桶内；2. Weigh 150 grams of material B (ash), 450 grams of water, and 1350 grams of standard sand and pour them into another mixing bucket;
3.同时搅拌5-7分钟形成甲料混合剂、乙料混合剂；3. Stir at the same time for 5-7 minutes to form a mixture of material A and material B;
4.将甲料混合剂、乙料混合剂倒在一起搅拌3-5分钟；4. Pour the mixture of material A and material B together and stir for 3-5 minutes;
5.将混合搅拌后的浆料注入规格为4×4×16cm的三联试模内；5. Inject the mixed slurry into a triple test mold with a specification of 4×4×16cm;
6.30分钟后材料凝固。6. After 30 minutes the material solidified.
试验结果见下表
试验结果表明：The results showed that:
(1)当水∶灰∶骨料为1∶2.5∶7，1∶3.0∶9时材料的强度比不加骨料的高水速凝材料的抗压、抗折强度更高，即低灰混凝土比高水材料有更好的力学特性。(1) When the ratio of water: ash: aggregate is 1:2.5:7, 1:3.0:9, the strength of the material is higher than the compressive and flexural strength of the high-water quick-setting material without aggregate, that is, low ash Concrete has better mechanical properties than high water materials.
(2)双低混凝土的弹性模量与高水材料由相同的量级102MPa，比普通水泥混凝土104MPa的弹性模量低二个量级(见表及图2所示)。(2) The elastic modulus of double-low concrete is the same as that of high-water materials , 10 2 MPa, which is two orders of magnitude lower than that of ordinary cement concrete (see table and Figure 2).
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| CN 98126155 CN1257846A (en) | 1998-12-23 | 1998-12-23 | Low-elasticity-modulus lean mix concrete and its preparing process |
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| CN 98126155 CN1257846A (en) | 1998-12-23 | 1998-12-23 | Low-elasticity-modulus lean mix concrete and its preparing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US12037905B2 (en) | 2019-04-16 | 2024-07-16 | China University Of Mining And Technology, Beijing | Method of no-pillar mining with gob-entry retaining adapted for fully-mechanized top coal caving in thick coal seam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12037905B2 (en) | 2019-04-16 | 2024-07-16 | China University Of Mining And Technology, Beijing | Method of no-pillar mining with gob-entry retaining adapted for fully-mechanized top coal caving in thick coal seam |
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