分類:行業新聞發(fa)布(bu)時間:2017/06/20
??A:再生細(xi)骨(gu)(gu)料(liao)(liao)混(hun)(hun)凝(ning)土是指以(yi)再生細(xi)骨(gu)(gu)料(liao)(liao)部(bu)分或全(quan)(quan)部(bu)替代天(tian)然(ran)細(xi)骨(gu)(gu)料(liao)(liao)的混(hun)(hun)凝(ning)土。再生骨(gu)(gu)料(liao)(liao)經(jing)過處理,各方面性能均有提高,但仍低于(yu)天(tian)然(ran)骨(gu)(gu)料(liao)(liao)。另外(wai)全(quan)(quan)部(bu)采(cai)用再生骨(gu)(gu)料(liao)(liao)會對混(hun)(hun)凝(ning)土性能有較大的影響,細(xi)骨(gu)(gu)料(liao)(liao)采(cai)用不同的替代率,粗骨(gu)(gu)料(liao)(liao)則全(quan)(quan)部(bu)采(cai)用天(tian)然(ran)碎石來配制混(hun)(hun)凝(ning)土。
??影(ying)響再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)質量的(de)(de)(de)(de)(de)主要因素有(you)以下幾個方面:1.再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)種類;2.再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)替(ti)(ti)代(dai)率(lv);3.水泥(ni)(ni)用量。根據北(bei)京(jing)聯綠建筑垃圾資源一(yi)體化(hua)工(gong)廠相關實驗數(shu)據顯(xian)示,簡(jian)單(dan)破(po)碎(sui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)用水量較大(da),且隨(sui)(sui)(sui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)替(ti)(ti)代(dai)率(lv)的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia)而(er)增(zeng)加(jia)(jia),而(er)顆粒整(zheng)(zheng)形再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)用水量較低(di);簡(jian)單(dan)破(po)碎(sui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)收(shou)縮(suo)(suo)大(da)于(yu)(yu)顆粒整(zheng)(zheng)形混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu),普通混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)早期收(shou)縮(suo)(suo)大(da)于(yu)(yu)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu),但其(qi)后(hou)期收(shou)縮(suo)(suo)明(ming)(ming)顯(xian)小(xiao)于(yu)(yu)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu),隨(sui)(sui)(sui)著(zhu)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)替(ti)(ti)代(dai)率(lv)的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia),再(zai)(zai)(zai)生(sheng)(sheng)(sheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)收(shou)縮(suo)(suo)有(you)所增(zeng)加(jia)(jia),再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)收(shou)縮(suo)(suo)隨(sui)(sui)(sui)著(zhu)水泥(ni)(ni)用量的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia)而(er)增(zeng)加(jia)(jia),水泥(ni)(ni)每(mei)增(zeng)加(jia)(jia)100kg/m3,再(zai)(zai)(zai)生(sheng)(sheng)(sheng)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)收(shou)縮(suo)(suo)約增(zeng)加(jia)(jia)5%;骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)整(zheng)(zheng)形再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)抗碳化(hua)性能(neng)(neng)、抗凍性能(neng)(neng)與抗氯(lv)(lv)離子滲(shen)(shen)透(tou)性能(neng)(neng)均(jun)優(you)于(yu)(yu)簡(jian)單(dan)破(po)碎(sui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu),簡(jian)單(dan)破(po)碎(sui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)的(de)(de)(de)(de)(de)抗凍性能(neng)(neng)隨(sui)(sui)(sui)著(zhu)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)替(ti)(ti)代(dai)率(lv)的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia)而(er)降低(di),顆粒整(zheng)(zheng)形再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)抗凍性能(neng)(neng)隨(sui)(sui)(sui)著(zhu)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)替(ti)(ti)代(dai)率(lv)的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia)變(bian)化(hua)不(bu)明(ming)(ming)顯(xian),再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)抗滲(shen)(shen)透(tou)性隨(sui)(sui)(sui)著(zhu)替(ti)(ti)代(dai)率(lv)的(de)(de)(de)(de)(de)增(zeng)大(da)變(bian)化(hua)不(bu)大(da),隨(sui)(sui)(sui)著(zhu)水泥(ni)(ni)用量的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia),再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)抗碳化(hua)性能(neng)(neng)增(zeng)強(qiang),抗凍性能(neng)(neng)提(ti)高(gao),抗氯(lv)(lv)離子滲(shen)(shen)透(tou)性提(ti)高(gao);簡(jian)單(dan)破(po)碎(sui)再(zai)(zai)(zai)生(sheng)(sheng)(sheng)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)抗壓強(qiang)度(du)和(he)劈(pi)裂抗拉(la)強(qiang)度(du)隨(sui)(sui)(sui)著(zhu)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)替(ti)(ti)代(dai)率(lv)的(de)(de)(de)(de)(de)增(zeng)加(jia)(jia)而(er)降低(di),顆粒整(zheng)(zheng)形細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)混(hun)(hun)(hun)凝(ning)土(tu)(tu)(tu)的(de)(de)(de)(de)(de)抗壓強(qiang)度(du)和(he)劈(pi)裂抗拉(la)強(qiang)度(du)隨(sui)(sui)(sui)著(zhu)細(xi)(xi)(xi)(xi)(xi)(xi)(xi)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)(liao)(liao)(liao)的(de)(de)(de)(de)(de)替(ti)(ti)代(dai)率(lv)增(zeng)加(jia)(jia)而(er)增(zeng)加(jia)(jia)。
??Q:什么是高性能再生(sheng)粗骨料混凝土?
??A:礦(kuang)物摻合(he)料(liao)(liao)在改善混(hun)凝(ning)(ning)土的(de)(de)用(yong)水量(liang)、力學(xue)(xue)性能(neng)和耐(nai)久(jiu)性方面起著重(zhong)要的(de)(de)作用(yong)。膠凝(ning)(ning)材料(liao)(liao)體系的(de)(de)改善可以加快混(hun)凝(ning)(ning)土體系的(de)(de)水化反應進程(cheng),改善混(hun)凝(ning)(ning)土的(de)(de)微觀結(jie)構,從而提高(gao)混(hun)凝(ning)(ning)土的(de)(de)力學(xue)(xue)性能(neng)和耐(nai)久(jiu)性能(neng)。利(li)用(yong)粉煤灰、礦(kuang)粉和硅(gui)灰等礦(kuang)物摻合(he)料(liao)(liao)大(da)量(liang)替(ti)代水泥,采(cai)用(yong)三民質再生(sheng)粗骨料(liao)(liao)按不同替(ti)代率替(ti)代碎石,并使用(yong)高(gao)效減水劑降低混(hun)凝(ning)(ning)土水膠比,制備工作性良好、強度較(jiao)高(gao)、耐(nai)久(jiu)性較(jiao)好的(de)(de)高(gao)性能(neng)再生(sheng)粗骨料(liao)(liao)混(hun)凝(ning)(ning)土,促(cu)進再生(sheng)粗骨料(liao)(liao)混(hun)凝(ning)(ning)土廣泛應用(yong)于各(ge)種(zhong)實際工程(cheng)中(zhong)。
??相關實驗表明(ming),控制(zhi)坍(tan)落度(du)不(bu)變(bian)時,三(san)民質再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)用水量(liang)隨再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)替(ti)代率的(de)增(zeng)加無明(ming)顯(xian)(xian)變(bian)化,在再(zai)(zai)生(sheng)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)中摻入(ru)粉(fen)(fen)煤灰、普通礦(kuang)(kuang)粉(fen)(fen)、超細(xi)礦(kuang)(kuang)粉(fen)(fen)、硅(gui)(gui)灰等礦(kuang)(kuang)物摻合料(liao)(liao)(liao)(liao)能明(ming)顯(xian)(xian)改善混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)工作性(xing)(xing)(xing);高性(xing)(xing)(xing)能再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)壓強(qiang)度(du)、劈(pi)裂(lie)抗(kang)拉強(qiang)度(du)和(he)抗(kang)折強(qiang)度(du)與(yu)天然(ran)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)強(qiang)度(du)接(jie)近;三(san)民質再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)凍(dong)性(xing)(xing)(xing)能隨著再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)替(ti)代率的(de)增(zeng)加而下(xia)降(jiang),與(yu)粉(fen)(fen)煤灰相比,普通礦(kuang)(kuang)粉(fen)(fen)能夠很(hen)好(hao)地(di)提高混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)凍(dong)性(xing)(xing)(xing),超細(xi)礦(kuang)(kuang)粉(fen)(fen)和(he)硅(gui)(gui)灰對(dui)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)凍(dong)性(xing)(xing)(xing)能改善效果(guo)不(bu)明(ming)顯(xian)(xian),三(san)民質再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)碳化性(xing)(xing)(xing)能良好(hao);三(san)民質再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)滲性(xing)(xing)(xing)接(jie)近天然(ran)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu),再(zai)(zai)生(sheng)粗(cu)(cu)骨(gu)(gu)(gu)(gu)(gu)料(liao)(liao)(liao)(liao)替(ti)代率的(de)增(zeng)加對(dui)再(zai)(zai)生(sheng)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)滲透(tou)性(xing)(xing)(xing)影響(xiang)不(bu)明(ming)顯(xian)(xian),超細(xi)礦(kuang)(kuang)粉(fen)(fen)和(he)硅(gui)(gui)灰都能很(hen)好(hao)地(di)提高再(zai)(zai)生(sheng)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)抗(kang)滲性(xing)(xing)(xing),膠凝(ning)(ning)(ning)(ning)材料(liao)(liao)(liao)(liao)堿含量(liang)不(bu)同對(dui)混(hun)(hun)(hun)(hun)凝(ning)(ning)(ning)(ning)土(tu)(tu)的(de)電(dian)通量(liang)影響(xiang)較(jiao)大。