CN104150838B - A kind of sisal fiber strengthens coral concrete and preparation method thereof - Google Patents
A kind of sisal fiber strengthens coral concrete and preparation method thereof Download PDFInfo
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- 235000014653 Carica parviflora Nutrition 0.000 title claims abstract description 107
- 239000004567 concrete Substances 0.000 title claims abstract description 93
- 239000000835 fiber Substances 0.000 title claims abstract description 72
- 244000198134 Agave sisalana Species 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 244000132059 Carica parviflora Species 0.000 title abstract description 95
- 239000004568 cement Substances 0.000 claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 22
- 239000013535 sea water Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000011398 Portland cement Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 3
- 241000243321 Cnidaria Species 0.000 claims 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 5
- 239000010703 silicon Substances 0.000 claims 5
- 229910052710 silicon Inorganic materials 0.000 claims 5
- 239000002956 ash Substances 0.000 claims 4
- 241000242757 Anthozoa Species 0.000 claims 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims 1
- 238000007580 dry-mixing Methods 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 19
- 229910021487 silica fume Inorganic materials 0.000 abstract description 19
- 239000000203 mixture Substances 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000032683 aging Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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Abstract
本发明公开了一种剑麻纤维增强珊瑚混凝土及其制备方法。该混凝土由珊瑚混凝土和剑麻纤维组成；珊瑚混凝土为C30等级的珊瑚混凝土，其每立方米的组分为：315~360千克水泥、90~135千克硅灰、830千克砂、716千克珊瑚和180千克海水，水泥与硅灰质量之和为450千克。将水泥、硅灰、砂和珊瑚倒入搅拌机中，搅拌，加入剑麻纤维，干拌均匀，再加入海水，搅拌，即得最终的剑麻纤维增强珊瑚混凝土。本发明的混凝土劈裂抗拉强度、抗折强度高，且具有节能环保、造价低、导热性低、无电磁干扰等特点。The invention discloses a sisal fiber reinforced coral concrete and a preparation method thereof. The concrete is composed of coral concrete and sisal fiber; coral concrete is coral concrete of C30 grade, and its components per cubic meter are: 315-360 kg of cement, 90-135 kg of silica fume, 830 kg of sand, 716 kg of coral and 180 kg of seawater, the sum of the mass of cement and silica fume is 450 kg. Pour cement, silica fume, sand and coral into a mixer, stir, add sisal fiber, dry mix evenly, then add sea water, and stir to obtain the final sisal fiber reinforced coral concrete. The concrete of the invention has high splitting tensile strength and flexural strength, and has the characteristics of energy saving, environmental protection, low cost, low thermal conductivity, no electromagnetic interference and the like.
Description
技术领域 technical field
本发明属于建筑工程材料技术领域，特别涉及一种剑麻纤维增强珊瑚混凝土及其制备方法。 The invention belongs to the technical field of building engineering materials, in particular to a sisal fiber reinforced coral concrete and a preparation method thereof.
背景技术 Background technique
珊瑚混凝土在海岛建设中具有广阔的应用前景，可应用于防洪堤、岛屿和沿海地区的公路、机场和其他项目。在不破坏当地生态环境的前提下，基于珊瑚礁代替粗骨料，海水代替淡水配制而成的珊瑚混凝土在土木工程和军事工程上具有重大的现实意义。为了改善珊瑚混凝土的强度和韧性，参考掺入纤维于普通混凝土的例子，在珊瑚混凝土中掺入剑麻纤维，以此来提高珊瑚混凝土的基本力学性能。 Coral concrete has broad application prospects in island construction and can be applied to flood barriers, roads, airports and other projects in islands and coastal areas. Under the premise of not destroying the local ecological environment, the coral concrete prepared based on coral reef instead of coarse aggregate and seawater instead of fresh water has great practical significance in civil engineering and military engineering. In order to improve the strength and toughness of coral concrete, referring to the example of adding fibers to ordinary concrete, sisal fibers are mixed into coral concrete to improve the basic mechanical properties of coral concrete.
纤维增强珊瑚混凝土是以珊瑚混凝土为基体，纤维为增强材料所制成的水泥基复合材料的总称。由于纤维可以很好地抑制裂缝的开展，纤维增强珊瑚混凝土是改善珊瑚混凝土受力性能的有效方法。 Fiber-reinforced coral concrete is a general term for cement-based composite materials made of coral concrete as a matrix and fiber as a reinforcing material. Since fibers can well inhibit the development of cracks, fiber-reinforced coral concrete is an effective method to improve the mechanical properties of coral concrete.
以往在混凝土中掺加的纤维，大多数为人工纤维和矿物纤维，但是两者都没有绿色、环保、经济的优点，而非绿色建材。剑麻纤维具有廉价、质轻，可在自然条件下分解以及无污染的优点。此外，剑麻纤维还具有较高的强度以及耐腐蚀、耐酸碱的特点，特别是其维管束中空结构，使应力集中更好地缓解，它的发展前景将会越来越广泛。 Most of the fibers added to concrete in the past are artificial fibers and mineral fibers, but neither of them has the advantages of green, environmental protection, and economy, and they are not green building materials. Sisal fiber has the advantages of cheapness, light weight, decomposing under natural conditions and no pollution. In addition, sisal fiber also has the characteristics of high strength, corrosion resistance, acid and alkali resistance, especially its hollow structure of vascular bundles, which can better relieve stress concentration, and its development prospects will become more and more extensive.
剑麻纤维与一定量的水泥珊瑚混凝土混合，以改善新拌珊瑚混凝土的工作性能，体现在新拌珊瑚混凝土泌水率和坍落度的减少，空气含量也有一定的提高，剑麻纤维增强珊瑚混凝土力学性能试验结果表明，剑麻纤维的掺入对提高珊瑚混凝土的抗压强度的效果不明显，但对于提高珊瑚混凝土劈裂抗拉强度和抗折强度有显著作用。此外，剑麻纤维还可以有效地抑制珊瑚混凝土的收缩，特别是对于早期珊瑚混凝土收缩的影响更显著。 Sisal fiber is mixed with a certain amount of cement coral concrete to improve the working performance of fresh coral concrete, which is reflected in the reduction of bleeding rate and slump of fresh coral concrete, and the air content is also improved to a certain extent. Sisal fiber strengthens coral The test results of concrete mechanical properties show that the incorporation of sisal fiber has no obvious effect on improving the compressive strength of coral concrete, but it has a significant effect on improving the splitting tensile strength and flexural strength of coral concrete. In addition, sisal fiber can also effectively inhibit the shrinkage of coral concrete, especially for the shrinkage of early coral concrete.
研究剑麻纤维增强混凝土的抗侵蚀性，发现Ca(OH)2在剑麻纤维的内腔和孔隙内结晶，使剑麻纤维变脆，逐渐失去增强的作用；而硅灰的掺入可以有效减小Ca(OH)2的生成，提高剑麻纤维增强珊瑚混凝土的耐久性；掺量为20%～30%的硅灰可以有效抑制剑麻纤维在硅酸盐水泥砂浆中的老化。以上思路还未见文献报道。 Research on the corrosion resistance of sisal fiber reinforced concrete, found that Ca(OH) 2 crystallized in the cavity and pores of sisal fiber, which made sisal fiber brittle and gradually lost its reinforcing effect; while the incorporation of silica fume can effectively Reduce the formation of Ca(OH) 2 and improve the durability of sisal fiber reinforced coral concrete; the addition of 20% to 30% silica fume can effectively inhibit the aging of sisal fiber in Portland cement mortar. The above ideas have not been reported in the literature.
发明内容 Contents of the invention
本发明的目的是提供一种剑麻纤维增强珊瑚混凝土及其制备方法。 The object of the present invention is to provide a kind of sisal fiber reinforced coral concrete and its preparation method.
本发明的技术方案： Technical scheme of the present invention:
一种剑麻纤维增强珊瑚混凝土，由珊瑚混凝土和剑麻纤维组成，两种组分的体积百分比含量为：99.72~99.79%的珊瑚混凝土和0.21~0.28%的剑麻纤维，两者体积百分比之和为100%。 A sisal fiber reinforced coral concrete, which is composed of coral concrete and sisal fiber, the volume percentage content of the two components is: 99.72-99.79% coral concrete and 0.21-0.28% sisal fiber, the volume percentage of the two components is The sum is 100%.
所述珊瑚混凝土为C30等级的珊瑚混凝土，其每立方米的组分为：315~360千克水泥、90~135千克硅灰、830千克砂、716千克珊瑚和180千克海水，水泥与硅灰质量之和为450千克；其中：水泥为标号42.5的普通硅酸盐水泥；硅灰为粒径大小为0.1微米，比表面积为28±0.1m2/g的硅灰；砂为天然河砂；珊瑚为普通碎石型珊瑚礁。 The coral concrete is coral concrete of C30 grade, and its components per cubic meter are: 315-360 kilograms of cement, 90-135 kilograms of silica fume, 830 kilograms of sand, 716 kilograms of coral and 180 kilograms of seawater, the quality of cement and silica fume The sum is 450 kg; among them: cement is ordinary portland cement with label 42.5; silica fume is silica fume with a particle size of 0.1 micron and a specific surface area of 28±0.1m 2 /g; sand is natural river sand; coral It is an ordinary gravel coral reef.
所述剑麻纤维的长度为10±2毫米，抗拉强度为500~700兆帕。 The length of the sisal fiber is 10±2 mm, and the tensile strength is 500-700 MPa.
上述剑麻纤维增强珊瑚混凝土的制备方法，具体步骤为： The preparation method of above-mentioned sisal fiber reinforced coral concrete, concrete steps are:
(1)按照上述组分要求称取所有原料，备用。 (1) Weigh all the raw materials according to the above composition requirements and set aside.
(2)将步骤(1)称取的水泥、硅灰、砂和珊瑚倒入搅拌机经搅拌均匀后加入步骤(1)称取的剑麻纤维并干拌均匀，最后加入步骤(1)称取的海水搅拌均匀，即制得剑麻纤维增强珊瑚混凝土。 (2) Pour the cement, silica fume, sand and coral weighed in step (1) into the mixer, stir evenly, add the sisal fiber weighed in step (1) and dry mix evenly, and finally add the The seawater is evenly stirred to obtain sisal fiber reinforced coral concrete.
与现有技术相比，本发明具有如下的有益效果：本发明利用剑麻纤维增强珊瑚混凝土，提高珊瑚混凝土的劈裂抗拉强度、抗折强度；同时，本发明制得的剑麻纤维增强珊瑚混凝土材料具有节能环保、造价低、导热性低、无电磁干扰等特点；另外，硅灰的掺入，能够显著提高珊瑚混凝土的抗渗性，强度，耐化学腐蚀性，珊瑚混凝土中部分水泥被硅灰替代后能够降低胶凝材料的碱性，降低Ca(OH)2的生成量，提高剑麻纤维的耐腐蚀性。 Compared with the prior art, the present invention has the following beneficial effects: the present invention utilizes sisal fiber to reinforce coral concrete, and improves the splitting tensile strength and flexural strength of coral concrete; at the same time, the sisal fiber reinforced by the present invention Coral concrete materials have the characteristics of energy saving and environmental protection, low cost, low thermal conductivity, and no electromagnetic interference; in addition, the addition of silica fume can significantly improve the impermeability, strength, and chemical corrosion resistance of coral concrete. Part of the cement in coral concrete After being replaced by silica fume, it can reduce the alkalinity of the gelling material, reduce the generation of Ca(OH) 2 , and improve the corrosion resistance of sisal fiber.
具体实施方式 detailed description
下面结合具体实施例对本发明进行详细说明。以下实施例有助于本领域的技术人员进一步理解本发明，但不以任何形式限制本发明。应当指出的是，对本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进。这些都属于本发明的保护范围。 The present invention will be described in detail below in conjunction with specific embodiments. The following examples help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
实施例1：Example 1:
一种剑麻纤维增强珊瑚混凝土，由珊瑚混凝土和剑麻纤维组成，两种组分的体积百分比含量为：99.79%的珊瑚混凝土和0.21%的剑麻纤维；该剑麻纤维增强珊瑚混凝土的水灰比（每立方米珊瑚混凝土中的水重量与水泥重量之比值）为0.40。 A kind of sisal fiber reinforced coral concrete, is made up of coral concrete and sisal fiber, and the volume percentage content of two components is: 99.79% coral concrete and 0.21% sisal fiber; The water of this sisal fiber reinforced coral concrete The gray ratio (the ratio of water weight to cement weight per cubic meter of coral concrete) is 0.40.
所述珊瑚混凝土每立方米的组分为：450千克水泥、830千克砂、716千克珊瑚和180千克海水；其中：水泥为标号42.5的普通硅酸盐水泥；砂为天然河砂；珊瑚为普通碎石型珊瑚礁。 The components per cubic meter of the coral concrete are: 450 kilograms of cement, 830 kilograms of sand, 716 kilograms of coral and 180 kilograms of seawater; wherein: cement is ordinary Portland cement with a label of 42.5; sand is natural river sand; coral is ordinary Gravel coral reefs.
所述剑麻纤维的长度为10±2毫米，抗拉强度为500~700兆帕，质量为3千克。 The length of the sisal fiber is 10±2 mm, the tensile strength is 500-700 MPa, and the mass is 3 kg.
上述剑麻纤维增强珊瑚混凝土的制备方法，具体步骤为： The preparation method of above-mentioned sisal fiber reinforced coral concrete, concrete steps are:
(1)按照上述组分要求称取所有原料，备用。 (1) Weigh all the raw materials according to the above composition requirements and set aside.
(2)将步骤(1)称取的水泥、砂和珊瑚倒入搅拌机经搅拌60秒后加入步骤(1)称取的剑麻纤维并干拌30秒使其混合均匀，最后加入步骤(1)称取的海水搅拌均匀，即制得剑麻纤维增强珊瑚混凝土。 (2) pour the cement, sand and coral weighed in step (1) into the blender and add the sisal fiber weighed in step (1) after stirring for 60 seconds and dry mix it for 30 seconds to make it evenly mixed, and finally add step (1) ) and stir evenly the seawater taken to obtain sisal fiber reinforced coral concrete.
本实施例制备的剑麻纤维增强珊瑚混凝土的容重为2180kg/m3；28天后，本实施例的剑麻纤维增强珊瑚混凝土与相同配合比的素珊瑚混凝土的抗压强度基本相同；与相同配合比的素珊瑚混凝土比较，劈裂抗拉强度提升约16%；与相同配合比的素珊瑚混凝土比较，抗折强度提升48.5%。 The bulk density of the sisal fiber reinforced coral concrete prepared by the present embodiment is 2180kg/m 3 ; after 28 days, the compressive strength of the plain coral concrete of the sisal fiber reinforced coral concrete of the present embodiment and the same mix ratio is basically the same; Compared with plain coral concrete, the splitting tensile strength is increased by about 16%; compared with the same mix ratio of plain coral concrete, the flexural strength is increased by 48.5%.
实施例2：Example 2:
一种剑麻纤维增强珊瑚混凝土，由珊瑚混凝土和剑麻纤维组成，两种组分的体积百分比含量为：99.72%的珊瑚混凝土和0.28%的剑麻纤维，该剑麻纤维增强珊瑚混凝土的水灰比（每立方米珊瑚混凝土中的水重量与水泥重量之比值）为0.40。 A kind of sisal fiber reinforced coral concrete, which is composed of coral concrete and sisal fiber, the volume percentage content of the two components is: 99.72% coral concrete and 0.28% sisal fiber, the sisal fiber strengthens the water content of coral concrete The gray ratio (the ratio of water weight to cement weight per cubic meter of coral concrete) is 0.40.
所述珊瑚混凝土每立方米的组分为：450千克水泥、830千克砂、716千克珊瑚和180千克海水；其中：水泥为标号42.5的普通硅酸盐水泥；砂为天然河砂；珊瑚为普通碎石型珊瑚礁。 The components per cubic meter of the coral concrete are: 450 kilograms of cement, 830 kilograms of sand, 716 kilograms of coral and 180 kilograms of seawater; wherein: cement is ordinary Portland cement with a label of 42.5; sand is natural river sand; coral is ordinary Gravel coral reefs.
所述剑麻纤维的长度为10±2毫米，抗拉强度为500~700兆帕，质量为4.5千克。 The length of the sisal fiber is 10±2 mm, the tensile strength is 500-700 MPa, and the mass is 4.5 kg.
上述剑麻纤维增强珊瑚混凝土的制备方法，具体步骤为： The preparation method of above-mentioned sisal fiber reinforced coral concrete, concrete steps are:
(1)按照上述组分要求称取所有原料，备用。 (1) Weigh all the raw materials according to the above composition requirements and set aside.
(2)将步骤(1)称取的水泥、砂和珊瑚倒入搅拌机经搅拌60秒后加入步骤(1)称取的剑麻纤维并干拌30秒使其混合均匀，最后加入步骤(1)称取的海水搅拌均匀，即制得剑麻纤维增强珊瑚混凝土。 (2) pour the cement, sand and coral weighed in step (1) into the blender and add the sisal fiber weighed in step (1) after stirring for 60 seconds and dry mix it for 30 seconds to make it evenly mixed, and finally add step (1) ) and stir evenly the seawater taken to obtain sisal fiber reinforced coral concrete.
本实施例制备的剑麻纤维增强珊瑚混凝土的容重为2180kg/m3；28天后，本实施例的剑麻纤维增强珊瑚混凝土与相同配合比的素珊瑚混凝土的抗压强度基本相同；与相同配合比的素珊瑚混凝土比较，劈裂抗拉强度提升约16.9%；与相同配合比的素珊瑚混凝土比较，抗折强度提升43.4%。 The bulk density of the sisal fiber reinforced coral concrete prepared by the present embodiment is 2180kg/m 3 ; after 28 days, the compressive strength of the plain coral concrete of the sisal fiber reinforced coral concrete of the present embodiment and the same mix ratio is basically the same; Compared with plain coral concrete, the splitting tensile strength increased by about 16.9%; compared with the same mix ratio of plain coral concrete, the flexural strength increased by 43.4%.
实施例3：Example 3:
一种剑麻纤维增强珊瑚混凝土，由珊瑚混凝土和剑麻纤维组成，两种组分的体积百分比含量为：99.72%的珊瑚混凝土和0.28%的剑麻纤维，该剑麻纤维增强珊瑚混凝土的水灰比（每立方米珊瑚混凝土中的水重量与水泥重量之比值）为0.40。 A kind of sisal fiber reinforced coral concrete, which is composed of coral concrete and sisal fiber, the volume percentage content of the two components is: 99.72% coral concrete and 0.28% sisal fiber, the sisal fiber strengthens the water content of coral concrete The gray ratio (the ratio of water weight to cement weight per cubic meter of coral concrete) is 0.40.
所述珊瑚混凝土为C30等级的珊瑚混凝土，其每立方米的组分为：337.5千克水泥、112.5千克硅灰、830千克砂、716千克珊瑚和180千克海水；其中：水泥为标号42.5的普通硅酸盐水泥；硅灰为粒径大小为0.1微米，比表面积为28m2/g的硅灰；砂为天然河砂；珊瑚为普通碎石型珊瑚礁。 The coral concrete is coral concrete of C30 grade, and its components per cubic meter are: 337.5 kilograms of cement, 112.5 kilograms of silica fume, 830 kilograms of sand, 716 kilograms of coral and 180 kilograms of seawater; wherein: cement is ordinary silica gel with a label of 42.5 salt cement; silica fume is silica fume with a particle size of 0.1 microns and a specific surface area of 28m 2 /g; sand is natural river sand; coral is ordinary gravel coral reef.
所述剑麻纤维的长度为10±2毫米，抗拉强度为500~700兆帕，质量为4.5千克。 The length of the sisal fiber is 10±2 mm, the tensile strength is 500-700 MPa, and the mass is 4.5 kg.
上述剑麻纤维增强珊瑚混凝土的制备方法，具体步骤为： The preparation method of above-mentioned sisal fiber reinforced coral concrete, concrete steps are:
(1)按照上述组分要求称取所有原料，备用。 (1) Weigh all the raw materials according to the above composition requirements and set aside.
(2)将步骤(1)称取的水泥、硅灰、砂和珊瑚倒入搅拌机经搅拌60秒后加入步骤(1)称取的剑麻纤维并干拌30秒使其混合均匀，最后加入步骤(1)称取的海水搅拌均匀，即制得剑麻纤维增强珊瑚混凝土。 (2) Pour the cement, silica fume, sand and coral weighed in step (1) into the mixer and stir for 60 seconds, then add the sisal fiber weighed in step (1) and dry mix for 30 seconds to make it evenly mixed, and finally add The seawater weighed in step (1) is stirred evenly to obtain sisal fiber reinforced coral concrete.
本实施例制备的剑麻纤维增强珊瑚混凝土的容重为2180kg/m3；28天后，本实施例的剑麻纤维增强珊瑚混凝土与相同配合比的素珊瑚混凝土的劈裂抗拉强度相比，当硅灰掺量为25%时，增幅为8.9%；当硅灰掺量为25%时，经干湿循环老化后的剑麻纤维增强珊瑚混凝土劈裂抗拉强度与老化前的劈裂抗拉强度相差不大，说明用25%的硅灰取代水泥能有效抑制剑麻纤维增强珊瑚混凝土中剑麻纤维的老化。 The bulk density of the sisal fiber reinforced coral concrete prepared by the present embodiment is 2180kg/m 3 ; When the content of silica fume is 25%, the increase rate is 8.9%; when the content of silica fume is 25%, the splitting tensile strength of sisal fiber reinforced coral concrete after dry-wet cycle aging is the same as the splitting tensile strength before aging The strength is not much different, indicating that replacing cement with 25% silica fume can effectively inhibit the aging of sisal fiber in sisal fiber reinforced coral concrete.
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