These are used for building or are broken down for use as an aggregate for concrete or as ballast chippings.
砖材用于建造房屋，或将其破碎作为混凝土骨料和铺道渣。
For lightweight aggregate concrete, supplementary rules are given in Section 11.
轻骨料混凝土，补充条文在第11款。
Light aggregate concrete hollow block is an ideal material for exterior wall of building energy saving.
轻集料混凝土空心砌块是一种理想的建筑节能外墙砌体材料。
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