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基于废弃与天然骨料混合集料的卷曲钢纤维对混凝土性能的影响

Influence of Crimped Steel Fibre on Properties of Concrete Based on an Aggregate Mix of Waste and Natural Aggregates.

作者信息

Katzer Jacek, Kobaka Janusz, Ponikiewski Tomasz

机构信息

Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-720 Olsztyn, Poland.

Faculty of Civil Engineering, Environmental and Geodetic Sciences, Koszalin University of Technology, 75-453 Koszalin, Poland.

出版信息

Materials (Basel). 2020 Apr 17;13(8):1906. doi: 10.3390/ma13081906.

DOI:10.3390/ma13081906
PMID:32316631
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7216236/
Abstract

This research was inspired by the growing global shortage of natural aggregates. Different types of waste ceramics (apart from recycled concrete) are the most popular materials for the production of waste aggregates as possible substitutes for natural ones. The aim of this research was to analyse the efficiency of different aggregate mixes composed of waste and natural materials focusing on two waste ceramic aggregates, which were prepared concrete mixes based on specifically composed aggregates (blend of natural aggregate, porous and iron oxide-rich (red) waste ceramic aggregate, and dense, kaolin-based (white) waste ceramic aggregate). All aggregates were thoroughly tested before utilisation for concrete mix creation. Altogether, four blends of aggregates were prepared in order to prepare concrete mixes using a simplex experiment design. The mixes were then modified by adding various amounts of crimped steel fibre. Such properties of hardened steel fibre-reinforced concrete (SFRC) such as density, compressive strength, shear strength, ultrasound propagation velocity, dynamic modulus of elasticity, and limit of proportionality during flexural testing were of special interest. Tests were conducted according to European and Japanese standards. The achieved fibre-reinforced concretes were characterised by satisfactory strength characteristics, thereby enabling the substitution of traditional reinforcement. Strength classes according to the Model Code 2010 were assigned.

摘要

本研究受全球天然骨料日益短缺的启发。除再生混凝土外，不同类型的废陶瓷是生产废骨料最常用的材料，有望替代天然骨料。本研究的目的是分析由废料和天然材料组成的不同骨料混合物的效率，重点关注两种废陶瓷骨料，基于特定组成的骨料（天然骨料、多孔且富含氧化铁的（红色）废陶瓷骨料以及致密的、高岭土基的（白色）废陶瓷骨料的混合物）制备混凝土混合物。所有骨料在用于制备混凝土混合物之前都经过了全面测试。总共制备了四种骨料混合物，以便采用单纯形实验设计制备混凝土混合物。然后通过添加不同量的卷曲钢纤维对混合物进行改性。硬化钢纤维增强混凝土（SFRC）的一些性能，如密度、抗压强度、抗剪强度、超声波传播速度、动态弹性模量以及弯曲试验中的比例极限，受到特别关注。测试按照欧洲和日本标准进行。所制备的纤维增强混凝土具有令人满意的强度特性，从而能够替代传统钢筋。根据《2010 年模型规范》指定了强度等级。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/2382f434c805/materials-13-01906-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/409ff89bbd84/materials-13-01906-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/354e68dbccf3/materials-13-01906-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/24199c76ad15/materials-13-01906-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/4b1503790b0b/materials-13-01906-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/93a15deabe28/materials-13-01906-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/f29af68df368/materials-13-01906-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/33870b585c22/materials-13-01906-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/e99da1b2c2f3/materials-13-01906-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/55a47631c414/materials-13-01906-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/2382f434c805/materials-13-01906-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/409ff89bbd84/materials-13-01906-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/354e68dbccf3/materials-13-01906-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/24199c76ad15/materials-13-01906-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/4b1503790b0b/materials-13-01906-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/93a15deabe28/materials-13-01906-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/f29af68df368/materials-13-01906-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/33870b585c22/materials-13-01906-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/e99da1b2c2f3/materials-13-01906-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/55a47631c414/materials-13-01906-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36fb/7216236/2382f434c805/materials-13-01906-g011.jpg

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