所谓人(ren)工(gong)洗砂是指新(xin)鲜岩石，经机械破碎加工(gong)而成颗粒(li)直径0.15—5mm的产(chan)品(pin)，又经水(shui)洗，去除小于0.15mm的石粉及有害杂物而得到的一种非常(chang)洁净的砂石料。随着社会的发(fa)展和科技进步，水(shui)利(li)(li)、建(jian)筑、交通等行业都需要这种产(chan)品(pin)，用于修(xiu)筑水(shui)利(li)(li)大(da)坝(ba)、桥梁、电站、高层建(jian)筑、立交桥、水(shui)泥(ni)大(da)管等，市场看(kan)好(hao)。

制(zhi)砂(sha)(sha)机(ji)的(de)(de)工(gong)(gong)(gong)(gong)作原(yuan)理是根(gen)据“石打石”的(de)(de)方法来制(zhi)取人工(gong)(gong)(gong)(gong)砂(sha)(sha)的(de)(de)，碎(sui)石由大变小，由小变砂(sha)(sha)。工(gong)(gong)(gong)(gong)作原(yuan)理非常巧(qiao)妙。我国有(you)许多重点工(gong)(gong)(gong)(gong)程(cheng)，如三峡工(gong)(gong)(gong)(gong)程(cheng)都是用巴马克制(zhi)砂(sha)(sha)机(ji)生(sheng)产(chan)人工(gong)(gong)(gong)(gong)砂(sha)(sha)。这种制(zhi)砂(sha)(sha)机(ji)，制(zhi)砂(sha)(sha)量只能达到40%，其余的(de)(de)60%均为大小不(bu)一(yi)的(de)(de)碎(sui)石，通过筛分(fen)，把人工(gong)(gong)(gong)(gong)砂(sha)(sha)筛出。如果碎(sui)石有(you)销路，就按(an)这种方法生(sheng)产(chan)。如果想多出人工(gong)(gong)(gong)(gong)砂(sha)(sha)，碎(sui)石又要(yao)返回入巴马克制(zhi)砂(sha)(sha)机(ji)，以达到多产(chan)人工(gong)(gong)(gong)(gong)砂(sha)(sha)的(de)(de)目的(de)(de)。用这种工(gong)(gong)(gong)(gong)艺生(sheng)产(chan)的(de)(de)人工(gong)(gong)(gong)(gong)砂(sha)(sha)，粒形为立方体，圆润(run)饱(bao)满(man)，强度(du)好，很(hen)受用户青睐。

人(ren)工(gong)(gong)洗(xi)砂(sha)(sha)与天然(ran)砂(sha)(sha)相比而言，材(cai)质稳定、优(you)(you)良(liang)、粒度(du)级(ji)配置良(liang)好(hao)、细数可(ke)(ke)以人(ren)为(wei)的(de)(de)通过生产工(gong)(gong)艺来(lai)控制(zhi)、表(biao)面干净、不含有机质等(deng)等(deng)众多(duo)优(you)(you)点。人(ren)工(gong)(gong)洗(xi)沙经多(duo)年(nian)实(shi)用(yong)证明，力学(xue)性能(neng)(neng)特(te)别好(hao)，有一(yi)个工(gong)(gong)程(cheng)(cheng)，用(yong)天然(ran)砂(sha)(sha)拌(ban)制(zhi)的(de)(de)混(hun)凝(ning)土(tu)(tu)(tu)，水(shui)(shui)灰比0.55，水(shui)(shui)泥用(yong)量313kg/m3,28d抗压(ya)强度(du)8.4MPa，而用(yong)纯石灰岩人(ren)工(gong)(gong)洗(xi)砂(sha)(sha)拌(ban)制(zhi)的(de)(de)混(hun)凝(ning)土(tu)(tu)(tu)水(shui)(shui)泥用(yong)量300kg/m2,28d抗压(ya)强度(du)达(da)到18.5MPa，比天然(ran)砂(sha)(sha)混(hun)凝(ning)土(tu)(tu)(tu)强度(du)提(ti)高(gao)2.2倍，而水(shui)(shui)泥还(hai)节(jie)省(sheng)4.15%。从这个实(shi)例便(bian)可(ke)(ke)看(kan)出，人(ren)工(gong)(gong)洗(xi)砂(sha)(sha)优(you)(you)良(liang)性能(neng)(neng)以及为(wei)什么重点工(gong)(gong)程(cheng)(cheng)使用(yong)人(ren)工(gong)(gong)洗(xi)砂(sha)(sha)是(shi)有道理的(de)(de)。目前我国的(de)(de)混(hun)凝(ning)土(tu)(tu)(tu)用(yong)砂(sha)(sha)是(shi)天然(ran)砂(sha)(sha)石与人(ren)工(gong)(gong)砂(sha)(sha)并存，而且(qie)天然(ran)砂(sha)(sha)用(yong)量比人(ren)工(gong)(gong)砂(sha)(sha)用(yong)量大，但(dan)随着社会发展(zhan)和(he)(he)科技进步，随着天然(ran)砂(sha)(sha)资源的(de)(de)减少(shao)，人(ren)工(gong)(gong)洗(xi)砂(sha)(sha)将以其优(you)(you)良(liang)的(de)(de)性能(neng)(neng)，能(neng)(neng)适应(ying)现代化施工(gong)(gong)的(de)(de)要求，粒度(du)和(he)(he)级(ji)配能(neng)(neng)根据(ju)工(gong)(gong)程(cheng)(cheng)施工(gong)(gong)要求进行生产控制(zhi)和(he)(he)调(diao)整而越(yue)来(lai)越(yue)受到市场的(de)(de)青睐。国内(nei)外几十年(nian)的(de)(de)工(gong)(gong)程(cheng)(cheng)实(shi)践证明，人(ren)工(gong)(gong)洗(xi)砂(sha)(sha)具有天然(ran)砂(sha)(sha)不能(neng)(neng)比拟的(de)(de)优(you)(you)点，大量生产、实(shi)用(yong)是(shi)不可(ke)(ke)避免的(de)(de)趋(qu)势。（本文(wen)由中意矿机电商部编(bian)辑(ji)，如需(xu)转载请注(zhu)明出处 ）