和粘土砖相比,混凝土空心小砌块(简称小砌块)具有造价低、强度高和技术好学、设备简单、不占耕地、节约能源的特点,近几年发展很快。有些县小砌块的产量和粘土砖接近。建房户自己生产的小砌块,还可以充分发挥“就地取材、就地生产、就地使用”的优点。在农闲时利用附近的天然砂石所生产的小砌块,成本尤为低廉。在有条件的地方,还可以利用矿渣、煤矸石、碎砖等废料 Compared with clay bricks, hollow concrete blocks (small blocks for short) have the characteristics of low cost, high strength and studious technique, simple equipment, no occupation of cultivated land and energy conservation, and have developed rapidly in recent years. The output of small blocks in some counties is close to that of clay bricks. Building small houses produced by their own owners, but also can give full play to the advantages of “local materials, local production, on-site use.” The cost of using small blocks produced from nearby natural gravel during slack days is particularly low. In the conditions of place, you can also use slag, gangue, broken brick and other waste