A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ultrahigh-toughness cement-based composite material and design method thereof
The invention relates to an ultrahigh-toughness cement-based composite material and a design method thereof. The design method comprises the steps that firstly, the grading distribution state of all solid components of the ultrahigh-toughness cement-based composite material at different mixing ratios is determined according to a closest packing model, and multiple sets of matrixes with different compositions are formed; the mixing amount of thin and long fibers in each group of matrixes is changed, and under the condition that the compressive strength is met, a group of matrixes with the lowest mixing amount of the thin and long fibers is selected as a preferred group; thin and long fibers in a preferred group are partially replaced by thin and short fibers, and the flexural strength at different replacement rates is measured; and the preferred mixing amount of the thin and long fibers and the thin and short fibers is determined according to the mixing amount of the thin and long fibers corresponding to the preferred group and the replacement rate meeting the flexural strength, and the ultrahigh-toughness cement-based composite material is prepared according to the determined mixing ratio of the preferred group and the preferred mixing amount of the thin and long fibers and the thin and short fibers. The invention provides a scientific and simple method for determining the reasonable mixing amount of the fibers, so that the problems of waste caused by excessive use of the fibers and insufficient strength of the composite material caused by too small mixing amount of the fibers are avoided.
本申请涉及一种超高韧性水泥基复合材料及其设计方法，先根据最紧密堆积模型确定超高韧性水泥基复合材料不同配合比时各固体组分的级配分布状态，形成多组不同组成的基体；改变各组基体中细长纤维的掺量，在满足抗压强度的条件下选择细长纤维掺量最低的一组基体作为优选组，采用细短纤维部分取代优选组中的细长纤维，测定不同取代率时的抗折强度，根据优选组对应的细长纤维掺量、满足抗折强度的取代率确定细长纤维和细短纤维的优选掺量，按确定的优选组配合比、细长纤维和细短纤维的优选掺量制备超高韧性水泥基复合材料。本申请为确定纤维的合理掺量提供了科学简单的方法，以避免过量使用纤维造成浪费以及纤维掺量过少导致复合材料强度不足的问题。
Ultrahigh-toughness cement-based composite material and design method thereof
The invention relates to an ultrahigh-toughness cement-based composite material and a design method thereof. The design method comprises the steps that firstly, the grading distribution state of all solid components of the ultrahigh-toughness cement-based composite material at different mixing ratios is determined according to a closest packing model, and multiple sets of matrixes with different compositions are formed; the mixing amount of thin and long fibers in each group of matrixes is changed, and under the condition that the compressive strength is met, a group of matrixes with the lowest mixing amount of the thin and long fibers is selected as a preferred group; thin and long fibers in a preferred group are partially replaced by thin and short fibers, and the flexural strength at different replacement rates is measured; and the preferred mixing amount of the thin and long fibers and the thin and short fibers is determined according to the mixing amount of the thin and long fibers corresponding to the preferred group and the replacement rate meeting the flexural strength, and the ultrahigh-toughness cement-based composite material is prepared according to the determined mixing ratio of the preferred group and the preferred mixing amount of the thin and long fibers and the thin and short fibers. The invention provides a scientific and simple method for determining the reasonable mixing amount of the fibers, so that the problems of waste caused by excessive use of the fibers and insufficient strength of the composite material caused by too small mixing amount of the fibers are avoided.
本申请涉及一种超高韧性水泥基复合材料及其设计方法，先根据最紧密堆积模型确定超高韧性水泥基复合材料不同配合比时各固体组分的级配分布状态，形成多组不同组成的基体；改变各组基体中细长纤维的掺量，在满足抗压强度的条件下选择细长纤维掺量最低的一组基体作为优选组，采用细短纤维部分取代优选组中的细长纤维，测定不同取代率时的抗折强度，根据优选组对应的细长纤维掺量、满足抗折强度的取代率确定细长纤维和细短纤维的优选掺量，按确定的优选组配合比、细长纤维和细短纤维的优选掺量制备超高韧性水泥基复合材料。本申请为确定纤维的合理掺量提供了科学简单的方法，以避免过量使用纤维造成浪费以及纤维掺量过少导致复合材料强度不足的问题。
Ultrahigh-toughness cement-based composite material and design method thereof
一种超高韧性水泥基复合材料及其设计方法
ZHANG ZHIHAO (author) / CHEN LUYI (author) / XU TING (author) / ZHENG LI (author) / WU XIANZHI (author) / WANG YAZHOU (author) / HUANG YOUQIANG (author) / LI XIN (author) / GE KEYU (author) / BAO JIACHENG (author)
2020-09-04
Patent
Electronic Resource
Chinese
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