砌墙、贴墙劈开砖又名劈离砖，是陶瓷墙地砖的一种。一般以各种粘土或配以长石等制陶原料经干法粉碎加水或湿法球磨压滤后制成含水湿坯泥，再以装有中空模具的真空螺旋挤出机挤出成为由扁薄的筋条将两片砖坯连结为一体的中空坯体，再经切割干燥后烧成，然后以人工或机器沿筋条连结处劈开为两片产品，故名劈开砖。
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