德国科布伦茨市周边区域是德国乃至西欧最大的火山灰轻集料产地,每年有大量的浮石骨料通过莱茵河运往各地。因此,浮石骨料也是当地生产混凝土砌块的首先原料。科布伦茨市周边的混凝土砌块(砖)生产企业,浮石轻集料混凝土空心砌块、轻集料多排孔自保温 The surrounding area of ​​Koblenz, Germany, is the largest producer of volcanic ash light aggregates in Germany and even in Western Europe. Each year a large amount of pumice is transported through the Rhine. Therefore, pumice aggregate is also the first raw material for local production of concrete blocks. Around Koblenz city concrete block (brick) manufacturers, pumice lightweight aggregate concrete hollow block, light aggregate multi-row hole from the insulation