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抄取成型的石棉水泥板一般长度变化率较大,施工后,板材不是产生挠曲,就是对接部位产生间隙,从而影响其性能及美观。而长度变化率较小的硅钙板又需进行压蒸养护,制品成本高,难以推广应用。本专利提供一种简便的方法,生产出的石棉水泥板长度变化率很小,且价格低廉。其特点是:在生产石棉水泥板时,先在水泥中掺入细度为2000～7000cm~2/g的氢氧化铝或高铝化合物或其两者,然后加入石棉纤维和水,制成料浆,抄取成型,不需要压蒸养护就可生产出廉价的石棉水泥板。石棉水泥板所使用的水泥为普通、早强、
The general change of the length of the asbestos-cement board formed by copying is large. After the construction, the sheet is not flexed, that is, there is a gap in the butt joint, which affects its performance and appearance. The calcium silicate board with a small change in length needs pressure steaming and curing, and the product has a high cost and is difficult to popularize and apply. This patent provides a simple method, the asbestos cement board produced has a small rate of change in length and is inexpensive. Its characteristics are as follows: When asbestos cement board is produced, aluminum hydroxide or high-aluminum compound with a fineness of 2000-7000cm~2/g or both of them is mixed in the cement, and then asbestos fiber and water are added to make the material. Pulp, take shape, no need for pressure steam curing can produce cheap asbestos cement board. Asbestos cement board uses ordinary, early strength,