空心砖是建筑行业常用的墙体主材，由于质轻、消耗原材少等优势，已经成为国家建筑部门首先推荐的产品。与红砖一样，空心砖的常见制造原料是粘土和煤渣灰，一般规格是390×190×190mm。空心砖是以粘土、页岩等为主要原料，经过原料处理、成型、烧结制成。空心砖的孔洞总面积占其所在砖面积的百分率，称为空心砖的孔洞率，一般应在15%以上。空心砖和实心砖相比，可节省大量的土地用土和烧砖燃料，减轻运输重量；减轻制砖和砌筑时的劳动强度，加快施工进度；减轻建筑物自重，加高建筑层数，降低造价。
Hollow brick is the main wall material commonly used in the construction industry. Due to the advantages of light weight and less consumption of raw materials, it has become the first product recommended by the national construction department. Like red brick, the common raw materials of hollow brick are clay and cinder ash, and the general specification is 390 × 190 × 190mm. Hollow brick is made of clay, shale and other main raw materials after raw material treatment, molding and sintering. The percentage of the total hole area of the hollow brick in the brick area is called the hole rate of the hollow brick, which should be more than 15% generally. Compared with solid brick, hollow brick can save a lot of land soil and brick burning fuel, reduce the transportation weight, reduce the labor intensity of brick making and masonry, speed up the construction progress, reduce the weight of buildings, increase the number of floors and reduce the cost.