{"title":"Crushed Post-Consumer Glass as Partial Replacement of Sand in Concrete","authors":"T. Naik, Z. Wu","doi":"10.14359/10601","DOIUrl":null,"url":null,"abstract":"The feasibility of using crushed post-consumer glass as a partial replacement of sand in concrete has been studied. To suppress the deleterious reaction between the alkali in cement and the silica in crushed post-consumer glass (ASR), a Class F fly ash was used in the experiment with the cement replacements of about 15, 30, and 45 percent by mass using a ratio of fly ash inclusion to cement replaced of about 1.25. Therefore, actual fly ash to total cementitious materials ratio was 18, 35, and 51 by mass. For each combination of cement and fly ash, 15%, 30%, and 45% volume of SSD sand were replaced with crushed glass. The compressive strength and splitting tensile strength of concrete were determined at specified ages for each mixture. Alkali silica reaction was evaluated according to ASTM C 1260 (Mortar Bar Method). Test results indicate that both compressive strength and splitting tensile strength of concrete decrease slightly with an increase in the replacement rate of sand with crushed glass. At lower replacement rates (less than 45%), the Class F fly ash could only delay the onset of expansion, while with high amount of fly ash concrete was immune to ASR.","PeriodicalId":184301,"journal":{"name":"\"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference\"","volume":"122 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"\"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference\"","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14359/10601","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 12
Abstract
The feasibility of using crushed post-consumer glass as a partial replacement of sand in concrete has been studied. To suppress the deleterious reaction between the alkali in cement and the silica in crushed post-consumer glass (ASR), a Class F fly ash was used in the experiment with the cement replacements of about 15, 30, and 45 percent by mass using a ratio of fly ash inclusion to cement replaced of about 1.25. Therefore, actual fly ash to total cementitious materials ratio was 18, 35, and 51 by mass. For each combination of cement and fly ash, 15%, 30%, and 45% volume of SSD sand were replaced with crushed glass. The compressive strength and splitting tensile strength of concrete were determined at specified ages for each mixture. Alkali silica reaction was evaluated according to ASTM C 1260 (Mortar Bar Method). Test results indicate that both compressive strength and splitting tensile strength of concrete decrease slightly with an increase in the replacement rate of sand with crushed glass. At lower replacement rates (less than 45%), the Class F fly ash could only delay the onset of expansion, while with high amount of fly ash concrete was immune to ASR.
研究了用破碎的消费后玻璃代替混凝土中部分砂石的可行性。为了抑制水泥中的碱与破碎后消费玻璃(ASR)中的二氧化硅之间的有害反应,实验中使用了F级粉煤灰,水泥替代量分别为15%、30%和45%,粉煤灰包合物与替代水泥的比例约为1.25。因此,实际粉煤灰与总胶凝材料的质量比分别为18、35和51。对于水泥和粉煤灰的每种组合,用碎玻璃代替15%、30%和45%体积的SSD砂。测定了每种混合料在指定龄期混凝土的抗压强度和劈裂抗拉强度。根据ASTM C 1260(砂浆棒法)对碱硅反应进行评价。试验结果表明,混凝土的抗压强度和劈裂抗拉强度均随砂与碎玻璃替换率的增加而略有下降。在较低的替换率下(小于45%),F类粉煤灰只能延缓膨胀的开始,而高掺量的粉煤灰混凝土则不受ASR的影响。