The Influence of Hybrid Aggregates on Different Types of Concrete

Sandy Materials in Civil Engineering - Usage and Management Pub Date : 2019-07-25 DOI:10.5772/INTECHOPEN.88254

Jianhui Yang

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引用次数: 1

Abstract

This chapter presents different experimental results regarding the influences of normal-weight sand and lightweight sand (shale pottery (SP)) on different types of concrete. Because of the porosity of lightweight aggregates (LWAs), which can absorb and release water in concrete, the effect of concrete curing is better, and thus the properties of concrete are improved. On the other hand, because the lightweight coarse aggregate (LWCA) rises easily in all-lightweight concrete (ALWC) during pumping and vibration and the cost of ALWC is also higher, a method of replacing part of the lightweight aggregates in ALWC with normal-weight aggregates is used. These new types of concretes include sand lightweight concrete (SLWC), gravel lightweight concrete (GLWC), hybrid aggregate lightweight concrete (HALWC), and so on. This chapter mainly discusses the properties of lightweight aggregate concrete (LWAC), lightweight sand foamed concrete, lightweight sand mortar, and reinforced LWAC. The chapter also includes LWAC of high temperature, low temperature, durability, and uni- and multiaxial mechanical properties according to the results of our research group over recent decades. All of the experimental results show that the properties can meet Chinese National Code requirements.

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混杂骨料对不同类型混凝土的影响

本章介绍了关于正常重量砂和轻质砂(页岩陶(SP))对不同类型混凝土的影响的不同实验结果。由于轻骨料的多孔性，可以吸收和释放混凝土中的水分，因此混凝土的养护效果较好，从而改善了混凝土的性能。另一方面，由于轻质粗骨料在泵送和振动过程中容易上升，且成本较高，因此采用了将ALWC中的部分轻质骨料替换为正常重量骨料的方法。这些新型混凝土包括砂轻混凝土(SLWC)、砾石轻混凝土(GLWC)、混合骨料轻混凝土(HALWC)等。本章主要讨论轻骨料混凝土(LWAC)、轻砂泡沫混凝土、轻砂砂浆和加筋LWAC的性能。本章还根据本课题组近几十年的研究成果，包括高温、低温、耐久性、单轴和多轴力学性能的LWAC。实验结果表明，该材料的性能符合中国国家规范的要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Sandy Materials in Civil Engineering - Usage and Management

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