施工工藝 普通砼現(xiàn)場拌制

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1、普通砼現(xiàn)場拌制本工藝標(biāo)準(zhǔn)適用于工業(yè)與民用建筑的普通混凝土的現(xiàn)場拌制。2.1材料及主要機具：2.1.1水泥：水泥的品種、標(biāo)號、廠別及牌號應(yīng)符合混凝土配合比通知單的要求。水泥應(yīng)有出廠合格證及進(jìn)場試驗報告。2.1.2砂：砂的粒徑及產(chǎn)地應(yīng)符合混凝土配合比通知單的要求。砂中含泥量：當(dāng)混凝土強度等級≥C30時，含泥量≤3%；混凝土強度等級

2、其泥塊含量應(yīng)≤2%，有抗凍、抗?jié)B要求時，其泥塊含量應(yīng)≤l%。砂應(yīng)有試驗報告單。2.1.3石子（碎石或卵石）：石子的粒徑、級配及產(chǎn)地應(yīng)符合混凝土配合比通知單的要求。石子的針、片狀顆粒含量：當(dāng)混凝土強度等級≥C30時，應(yīng)≤15%；當(dāng)混凝土強度等級為C25～C15時，應(yīng)≤25%。石子的含泥量（小于0.8mm的塵屑、淤泥和粘土的總含量）：當(dāng)混凝土強度等級≥C30時，應(yīng)≤1%；當(dāng)混凝土強度等級為C25～C15時，應(yīng)≤2%；當(dāng)對混凝土有抗凍、抗?jié)B要求時，應(yīng)≤1%。石子的泥塊含量（大于5mm的純泥）：當(dāng)混凝土

3、強度等級≥C30時，應(yīng)≤05%；當(dāng)混凝土強度等級

4、pportunitytogetaway."WhenshippingviaShunTangQiao,whenriverwaterneeds,siazhenhardtopulltheboatoars,andurgentstepsontheship'srail,asmallwoodenboatoverturnedonthespot,theshipupsidedown,shiparmsintotheriverbottom,broughttheship2Japanfailedtocomeoutofthew

5、ater,andsiazhenwerealsosacrificed.1ZhangShuninthelittleboat,panic,jumpingontheRiverBankandescaped.(11)ChenJinhai,WuAdafishing-JapanesesoldierremainsonedayinApril1939,activeinWuzhen,anti-JapaneseforcesofZhuXiXinCheng,YanTomb,TaoYuanminYiShenZhuangYang

6、sideofthevillage,thisencounterwithagroupofJapanesesoldiers,engagedinafiercegunbattle.3soldiersheroicallybattleZhuXiforces,remainsfellintotheShenZhuangYang.ZhuXitroopsinpursuitoftheJapanese,andnotimetosalvagethesoldiersremains.ChenJinhai,WuAda2peopleu

7、ntilthelocalvillagersshotaway,totheYangside,Yangwasfoundintheremainsofsoldiers,thetwohurriedbackhometotakeoutthetoolsandhitthe3bodiesandflood,andmadeadeal.Thenextday,ZhuXitroopstransportedsoldiersremains.ChenJinhai,WuAdastoriesinitiativetosalvagether

8、emainsofsoldiersaffectedbytheanti-Japaneseforcesandlocalpeopleofpraise.(12)ShenYuezhenshippedgunstheendof1938,onadarknight,rainfalling,sleepytownstreets,thereareseveralshadowsintoagoddess.Soon,largelandownersofZhongShaomeibackdoorafewtimes,thedoorope