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含人造轻集料的非晶态金属纤维增强砂浆的强度、干燥收缩及碳化特性

Strength, Drying Shrinkage, and Carbonation Characteristic of Amorphous Metallic Fiber-Reinforced Mortar with Artificial Lightweight Aggregate.

作者信息

Choi Se-Jin, Kim Ji-Hwan, Bae Sung-Ho, Oh Tae-Gue

机构信息

Department of Architectural Engineering, Wonkwang University, 460 Iksan-daero, Iksan 54538, Korea.

出版信息

Materials (Basel). 2020 Oct 7;13(19):4451. doi: 10.3390/ma13194451.

DOI:10.3390/ma13194451
PMID:33036485
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579179/
Abstract

This paper investigates the strength, drying shrinkage, and carbonation characteristic of amorphous metallic fiber-reinforced mortar with natural and artificial lightweight aggregates. The use of artificial lightweight aggregates has the advantage of reducing the unit weight of the mortar or concrete, but there is a concern that mechanical properties of concrete such as compressive strength and tensile strength may deteriorate due to the porous properties of lightweight aggregates. In order to improve the mechanical properties of lightweight aggregate mortar, we added 0, 10, 20, and 30 kg/m of amorphous metallic fibers to the samples with lightweight aggregate; the same amount of fiber was applied to the samples with natural aggregate for comparison. According to this investigation, the flow of mortar decreased as the amount of amorphous metallic fiber increased, regardless of the aggregate type. The compressive strength of lightweight aggregate mortar with 10 kg/m amorphous metallic fiber was similar to that of the LAF0 sample without amorphous metallic fiber after 14 days. In addition, the flexural strength of the samples increased as the amount of amorphous metallic fiber increased. The highest 28-d flexural strength was obtained as approximately 9.28 MPa in the LAF3 sample, which contained 30 kg/m amorphous metallic fiber. The drying shrinkage of the samples with amorphous metallic fiber was smaller than that of the sample without amorphous metallic fiber.

摘要

本文研究了采用天然和人造轻集料的非晶态金属纤维增强砂浆的强度、干燥收缩及碳化特性。使用人造轻集料具有降低砂浆或混凝土单位重量的优点，但有人担心，由于轻集料的多孔特性，混凝土的抗压强度和抗拉强度等力学性能可能会变差。为了改善轻集料砂浆的力学性能，我们向含轻集料的样品中添加了0、10、20和30 kg/m³的非晶态金属纤维；将相同数量的纤维应用于含天然集料的样品以作比较。根据本研究，无论集料类型如何，随着非晶态金属纤维用量的增加，砂浆的流动度降低。含10 kg/m³非晶态金属纤维的轻集料砂浆在14天后的抗压强度与不含非晶态金属纤维的LAF0样品相似。此外，样品的抗折强度随着非晶态金属纤维用量的增加而提高。在含30 kg/m³非晶态金属纤维的LAF3样品中，28天抗折强度最高，约为9.28 MPa。含非晶态金属纤维的样品的干燥收缩小于不含非晶态金属纤维的样品。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/a098b4666329/materials-13-04451-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/d9547b9a0d41/materials-13-04451-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/9f09a8ba77f3/materials-13-04451-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/747fcfcc222c/materials-13-04451-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/27fd5c18716c/materials-13-04451-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/8c392266d4e1/materials-13-04451-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/7fd989ce9e1b/materials-13-04451-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/47eec891c58a/materials-13-04451-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/ec966d8bf87e/materials-13-04451-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/3f8ab1ad9170/materials-13-04451-g011a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/a098b4666329/materials-13-04451-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/d9547b9a0d41/materials-13-04451-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/8702620f37ea/materials-13-04451-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/209ebaec8a50/materials-13-04451-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/9f09a8ba77f3/materials-13-04451-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/747fcfcc222c/materials-13-04451-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/27fd5c18716c/materials-13-04451-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/8c392266d4e1/materials-13-04451-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/7fd989ce9e1b/materials-13-04451-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/47eec891c58a/materials-13-04451-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/ec966d8bf87e/materials-13-04451-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/3f8ab1ad9170/materials-13-04451-g011a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/29e2/7579179/a098b4666329/materials-13-04451-g012.jpg

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