資源描述:
《硅粉對(duì)纖維橡膠再生混凝土抗壓性能影響試驗(yàn).pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第33卷第3期建筑科學(xué)與工程學(xué)報(bào)Vol.33No.32016年5月JournalofArchitectureandCivilEngineeringMay2016文章編號(hào):1673‐2049(2016)03‐0072‐06硅粉對(duì)纖維橡膠再生混凝土抗壓性能影響試驗(yàn)謝建和,李自堅(jiān),孫明煒(廣東工業(yè)大學(xué)土木與交通工程學(xué)院,廣東廣州510006)摘要:以普通混凝土和橡膠再生混凝土為研究對(duì)象,通過(guò)摻入硅粉和纖維材料研究強(qiáng)化環(huán)保型混凝土抗壓性能的方法。用再生混凝土100%等體積代替粗骨料,用橡膠顆粒20%等體積代替細(xì)骨料,內(nèi)摻10%(質(zhì)量分?jǐn)?shù))
2、或外摻3%(質(zhì)量分?jǐn)?shù))硅粉以及摻入聚丙烯纖維或鋼纖維,制備了4組12個(gè)混凝土立方體試件,通過(guò)軸壓試驗(yàn)研究了混凝土試件的破壞模式、抗壓強(qiáng)度和工作性能。結(jié)果表明:與單一摻入硅粉相比,硅粉和聚丙烯纖維的復(fù)合摻入能進(jìn)一步強(qiáng)化混凝土的抗壓性能;硅粉的摻入可以強(qiáng)化漿體與橡膠顆粒間的界面性能,提高鋼纖維橡膠再生混凝土的抗壓強(qiáng)度;硅粉和纖維材料對(duì)混凝土的工作性能有負(fù)作用,其復(fù)合摻入時(shí)建議采用適量的減水劑。關(guān)鍵詞:再生混凝土;硅粉;橡膠;聚丙烯纖維;鋼纖維;抗壓性能中圖分類號(hào):TU528.572文獻(xiàn)標(biāo)志碼:AExperimentAboutInflu
3、enceofSilicaFumeonCompressivePerformanceofFiberReinforcedRubberRecycledConcreteXIEJian‐he,LIZi‐jian,SUNMing‐wei(SchoolofCivilandTransportationEngineering,GuangdongUniversityofTechnology,Guangzhou510006,Guangdong,China)Abstract:Takingnormalconcreteandrubberrecycledconc
4、retesastheresearchobjects,themothedofreinforcingcompressiveperformanceofenvironmentalconcretewasstudiedthroughaddingsiliconpowderandfibermaterials.Recycledconcreteaggregatewasintroducedintotheconcretemixtureby100%volumefractiontoreplacecoarseaggregate.Thecrumbrubberco
5、ntentwasatlevelsof20%bymassfractiontoreplacefineaggregate,andthesilicafumecontentwasusedatlevelsof10%bymassfractiontoreplacecementoratlevelof3%bymassfractioninaddition,andpolypropylenefiberorsteelfiberwasaddedtotheconcrete.Atotalof4groupsofconcretespecimens(12cubes)we
6、recasted.Throughaxialcompressiontests,failuremodes,compressivestrengthandworkabilityoftheconcretewereanalyzed.Theresultsindicatethatcomparingwiththeconcretewithonlyaddingsilicafume,theincorporationofbothfibermaterialandsilicafumecanfurtherimprovethecompressiveperforma
7、nceofconcrete.Theadditionofsilicafumecanstrengthentheinterfacialperformancebetweenpasteandcrumbrubber,andimprovethecompressivestrengthofrubberandsteelfiberreinforcedrecycledaggregateconcrete.However,bothsiliconfumeandfibermaterialshavenegativeinfluencesontheworkabilit
8、yofconcretes,andacertaincontentofwaterreducerissupposedtouseinthemixture.Keywords:recycledconcrete;silicafume;rubber;polypro