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Civil Engineering

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Aggregates and Water

Aggregate Types by Size, Weight, and Source

Description

Aggregate types are grouped by size, petrographic characteristics, weight, and source. These categories help describe how different aggregates are identified and used in concrete. Size is one of the most common ways to classify them.

Based on particle size, aggregates are either coarse or fine. C...

Transcript

集料占混凝土总体积的近四分之三,可根据其粒径、来源、成分和重量进行分类。

根据粒径大小,被ASTM No.4筛余留的集料被归类为粗集料,而通过该筛的集料则被归类为细集料。

根据来源,天然集料包括从采石场获得的碎石、从砾石坑开采的砾石以及从河床挖掘的砂。

一些人造骨料是通过向熔融的高炉矿渣喷水形成膨胀高炉矿渣,或将黏土在回转窑中加热形成膨胀黏土,或破碎拆除的混凝土而制成的。

石英、长石、云母和方解石是一些在天然骨料中常见的矿物成分,具体成分取决于其母岩的类型。

最后,根据重量,集料可分为普通重量、重质和轻质集料。

普通重量集料常用于常规混凝土结构,重质集料用于制备具有辐射屏蔽功能的高密度混凝土,而轻质集料...