纤维材料及制品_2024_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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纤维材料及制品

耐碱玻纤的优选及其对高性能混凝土性能的影响

张立力1，杨婷丽1，李宏伟2，曹鑫铖1，夏如茜1，潘从玲1

2024年第3期

摘要

引用本文

摘要：通过碱溶液浸泡和胶砂强度试验，从8种耐碱玻纤中优选出了1种综合性能相对较好的耐碱玻纤，在此基础上，研究了耐碱玻纤的体积掺量（0、0.05%、0.10%、0.20%、0.40%、0.80%）和养护制度（蒸汽养护56 h、标准养护7 d）对C80、C95高性能混凝土工作性和力学性能的影响。结果表明：TS耐碱玻纤在碱溶液中浸泡96 h后表面无裂痕，且掺TS耐碱玻纤胶砂的28 d抗折、抗压强度相对较高；随着TS耐碱玻纤掺量的增加，C80、C95混凝土的工作性和抗压强度下降，抗折强度基本呈增大趋势；蒸汽养护试件的抗压、抗折强度比标准养护试件的高。 Abstract: Through alkaline solution immersion and mortar strength tests, one alkali resistant glass fiber with relatively good comprehensive performance was selected from eight types of alkali resistant glass fiber. Based on this, the effects of the volume content (0, 0.05%, 0.10%, 0.20%, 0.40%, 0.80%) of alkali resistant glass fiber and curing system (steam curing for 56 h and standard curing for 7 d) on the workability and mechanical properties of C80 and C95 high performance concrete were studied. The results show that there are no cracks on the surface of TS alkali resistant glass fiber after soaking in alkaline solution for 96 h, and the 28 d flexural and compressive strength of mortar with TS alkali resistant glass fiber are relatively high. With the increase of TS alkali resistant glass fiber content, the workability and compressive strength of C80 and C95 concrete decrease, while the flexural strength basically shows an increasing trend. The compressive and flexural strength of steam cured specimens are higher than those of standard cured specimens.

张立力，杨婷丽，李宏伟，耐碱玻纤的优选及其对高性能混凝土性能的影响[J].混凝土与水泥制品,2024(3):49-52. ZHANG L L,YANG T L,LI H W,et al.Optimization of alkali resistant glass fiber and its influence on performance of high performance concrete[J].China Concrete and Cement Products,2024(3):49-52.

聚丙烯纤维橡胶混凝土的力学及抗冻性能研究

苏有文，杨戟*，吕雄飞

2024年第3期

摘要

引用本文

摘要：研究了聚丙烯纤维的体积掺量（0.45%、0.90%、1.35%、1.80%、2.25%、3.41%、4.51%）对橡胶混凝土力学及抗冻性能的影响，并建立了冻融损伤劣化模型来预测橡胶混凝土的冻融损伤劣化规律。结果表明：掺入适量聚丙烯纤维可以有效提高橡胶混凝土的力学及抗冻性能，当聚丙烯纤维掺量在1.80%~2.25%范围内时，试件的力学及抗冻性能均较好；建立的冻融损伤劣化模型的拟合系数R2均大于0.992，拟合精度较高，可为聚丙烯纤维橡胶混凝土在寒冷地区工程中的应用提供理论依据。 Abstract: The effect of volume content of polypropylene fiber (0.45%, 0.90%, 1.35%, 1.80%, 2.25%, 3.41%, 4.51%) on the mechanical properties and frost resistance of rubber concrete was investigated, and a freeze-thaw damage deterioration model was established to predict the freeze-thaw damage deterioration law of rubber concrete in freeze-thaw environment. The results show that an appropriate content of polypropylene fiber can significantly improve the mechanical properties and frost resistance of rubber concrete, and the mechanical properties and frost resistance of rubber concrete are better when the content of polypropylene fiber is 1.80%~2.25%. The fitting coefficients R2 of the established freeze-thaw damage deterioration model is more than 0.992, and the fitting accuracy is high, which can provide theoretical basis for the application of polypropylene fiber rubber concrete in cold region engineering.

苏有文,杨戟,吕雄飞.聚丙烯纤维橡胶混凝土的力学及抗冻性能研究[J].混凝土与水泥制品,2024(3):53-56,61. SU Y W,YANG J,LYU X F.Study on mechanical properties and frost resistance of polypropylene fiber rubber concrete[J].China Concrete and Cement Products,2024(3):53-56,61.

不同掺合料对喷射钢纤维混凝土性能的影响

翟军强1，李向龙1，周霄骋2，秦世杰3，*，秦鸿根2

2024年第3期

摘要

引用本文

摘要：依托某重点工程隧道穹顶支护用高性能喷射混凝土的性能要求，配制了C40喷射钢纤维混凝土，研究了掺合料的种类（粉煤灰、专用掺合料、抗裂剂）对喷射钢纤维混凝土工作性、力学性能和耐久性能的影响。结果表明：掺不同掺合料喷射钢纤维混凝土的坍落度均满足（180±20）mm的要求，表观密度稳定在2 530 kg/m3左右，抗压强度均满足设计强度等级要求，耐久性能均较好；另外，与掺粉煤灰的喷射钢纤维混凝土相比，掺专用掺合料或抗裂剂的喷射钢纤维混凝土的保水性和黏聚性均较好，力学性能和耐久性能基本均较优，抗渗等级分别达到了P11和P10，28 d碳化深度均小于12.0 mm。 Abstract: Based on the performance requirements of high-performance shotcrete for tunnel dome support in a key engineering project, C40 shotcrete with steel fibers was prepared. The effects of different types of admixtures (fly ash, special admixtures, anti-cracking agents) on the workability, mechanical properties, and durability of shotcrete with steel fibers were studied. The results show that the slump of shotcrete with steel fibers mixed with different admixtures meets the requirement of (180±20)mm, the apparent density remains stable at around 2 530 kg/m3, the compressive strength meets the design strength grade requirements, and the durability performance is good. In addition, compared with the shotcrete with steel fibers mixed with fly ash, the shotcrete with steel fibers mixed with special admixtures or anti-cracking agents has better water retention and cohesion, and basically better mechanical properties and durability, and the impermeability level reaches P11 and P10 respectively, and the 28 d carbonation depth is less than 12.0 mm.

翟军强,李向龙,周霄骋,等.不同掺合料对喷射钢纤维混凝土性能的影响[J].混凝土与水泥制品,2024(3):57-61. ZHAI J Q,LI X L,ZHOU X C,et al.Effect of different admixtures on the properties of shotcrete with steel Fibres[J].China Concrete and Cement Products,2024(3):57-61.

聚丙烯纤维和塑钢纤维对TC20透水混凝土性能的影响

周敬山，林新周，刘向坤

2024年第3期

摘要

引用本文

摘要：通过研究单掺和复掺粉煤灰与矿粉对透水混凝土力学及透水性能的影响，优选出了TC20透水混凝土的最佳配合比，并在此基础上，对比研究了分别单掺0.05%、0.10%、0.15%、0.20%的塑钢纤维和聚丙烯纤维对透水混凝土力学、透水和抗冻性能的影响。结果表明：掺入适量粉煤灰、矿粉增大了透水混凝土的抗压强度、孔隙率和透水系数；与聚丙烯纤维相比，掺塑钢纤维试件的抗压强度、孔隙率、透水系数均较高，抗冻性能较好。综合考虑透水混凝土的抗压强度、透水性能和抗冻性能，推荐复掺15%粉煤灰与15%矿粉，并掺加不超过0.10%的塑钢纤维。 Abstract: The effects of single and composite addition of fly ash and mineral powder on the mechanical properties and permeability of pervious concrete were studied, and the best mix proportion for TC20 pervious concrete was selected. On this basis, the effects of single addition of 0.05%, 0.10%, 0.15% and 0.20% plastic steel fiber and polypropylene fiber alone on the mechanical properties, permeability and frost resistance of pervious concrete were comparatively studied. The results show that the compressive strength, porosity and water permeability coefficient of pervious concrete are increased by the addition of appropriate content of fly ash and mineral powder. Compared with polypropylene fiber, the compressive strength, porosity and water permeability coefficient of the specimens mixed with plastic steel fiber are higher, and the frost resistance is better. Comprehensively considering the compressive strength, permeability and frost resistance of pervious concrete, it is recommended to mix 15% content of fly ash and 15% content of mineral powder, and add no more than 0.10% content of plastic steel fiber.

周敬山,林新周,刘向坤.聚丙烯纤维和塑钢纤维对TC20透水混凝土性能的影响[J].混凝土与水泥制品,2024(3):62-65. ZHOU J S,LIN X Z,LIU X K.Effect of polypropylene fiber and plastic steel fiber on performance of TC20 pervious concrete[J].China Concrete and Cement Products,2024(3):62-65.

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