Pub Date : 1900-01-01DOI: 10.2991/assehr.k.200402.004
S. Suharwanto
—The experimental study has been done to get data of heat hydration. It important to know the temperature in the concrete during hydration reaction and forming a gel condition of silica reaction with water. Eighteen concrete specimens of cubes have been tested for many dimensions, those are cube 25cm, 50cm, 75cm for length all of side. They made from a fine and coarse aggregate of natural and recycled aggregate from burning building waste and ready-mix residual as a base concrete material. Base on the experimental study, the peak of heat hydration occurs at 10 to 21 hours. Then it will decrease that caused by hydration reaction will be complete and form to gel condition. The heat hydration in the concrete is not affected by site or room temperature, because it is caused by the hydration reaction process between silica and water until gel condition. The peak of heat hydration will increase along with higher concrete strength because it requires more cement that is reactor with water. It can affect to surface cracking for the mass concrete because it causes increasing adiabatic to fresh concrete in the early age. And it also affects a volumetric expansion in the core, so the surface of concrete gets excessive tensile stress beyond of capacity.
{"title":"Heat Hydration of Recycled Concrete: Experimental Study","authors":"S. Suharwanto","doi":"10.2991/assehr.k.200402.004","DOIUrl":"https://doi.org/10.2991/assehr.k.200402.004","url":null,"abstract":"—The experimental study has been done to get data of heat hydration. It important to know the temperature in the concrete during hydration reaction and forming a gel condition of silica reaction with water. Eighteen concrete specimens of cubes have been tested for many dimensions, those are cube 25cm, 50cm, 75cm for length all of side. They made from a fine and coarse aggregate of natural and recycled aggregate from burning building waste and ready-mix residual as a base concrete material. Base on the experimental study, the peak of heat hydration occurs at 10 to 21 hours. Then it will decrease that caused by hydration reaction will be complete and form to gel condition. The heat hydration in the concrete is not affected by site or room temperature, because it is caused by the hydration reaction process between silica and water until gel condition. The peak of heat hydration will increase along with higher concrete strength because it requires more cement that is reactor with water. It can affect to surface cracking for the mass concrete because it causes increasing adiabatic to fresh concrete in the early age. And it also affects a volumetric expansion in the core, so the surface of concrete gets excessive tensile stress beyond of capacity.","PeriodicalId":305822,"journal":{"name":"Proceedings of the International Conference on Agriculture, Social Sciences, Education, Technology and Health (ICASSETH 2019)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134490647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.2991/assehr.k.200402.028
T. Suciaty, Wijaya Wijaya, D. Dukat
—This study aims to analyse the growth response of soybean ( Glycine max (L.) Merrill) to the treatment of refugia plants and Nano silica fertilizer. The research was conducted at the Unit of Palawija Seed Development and Paddy, Agriculture Office of West Java Province, Plumbon, Cirebon Regency, from December 2018 to May 2019. The materials that were used include soybean varieties Grobogan, sunflowers, Zinnia elegant and marigolds, Nano silica fertilizers and NPK. This study uses a split plot design with the main plot was kind of refugia plants and sub-plots was Nano silica fertilizer concentration. The observed variables included plant height, stem diameter, number of leaves and number of branches, observations were made at the age of 14, 21, 28 and 35 days after planting (dap). The results showed that refugia plants had no effect on soybean growth, while the application of Nano silica fertilizer concentration of 1.75 ml/l and 3.50 ml/l gave the best effect on all components of soybean growth observed.
-本研究旨在分析大豆(Glycine max (L.))的生长响应。美林)对植物的处理和纳米二氧化硅肥料。该研究于2018年12月至2019年5月在西爪哇省普拉邦农业办公室Palawija种子开发和水稻部门进行。所使用的材料包括大豆品种Grobogan，向日葵，百日菊和万寿菊，纳米二氧化硅肥料和氮磷钾。本研究采用分块设计，主样地为避难植物，副样地为纳米二氧化硅肥料浓度。观察变量包括株高、茎粗、叶数和分枝数，分别在种植后14、21、28和35 d (dap)进行观察。结果表明，避难植物对大豆生长无影响，施用浓度为1.75 ml/l和3.50 ml/l的纳米二氧化硅肥对大豆各组分生长影响最佳。
{"title":"Response of Soybean Growth (Glycine max (L.) Merril) on the Treatment of Refugia Plant and Nanosilica Fertilizer","authors":"T. Suciaty, Wijaya Wijaya, D. Dukat","doi":"10.2991/assehr.k.200402.028","DOIUrl":"https://doi.org/10.2991/assehr.k.200402.028","url":null,"abstract":"—This study aims to analyse the growth response of soybean ( Glycine max (L.) Merrill) to the treatment of refugia plants and Nano silica fertilizer. The research was conducted at the Unit of Palawija Seed Development and Paddy, Agriculture Office of West Java Province, Plumbon, Cirebon Regency, from December 2018 to May 2019. The materials that were used include soybean varieties Grobogan, sunflowers, Zinnia elegant and marigolds, Nano silica fertilizers and NPK. This study uses a split plot design with the main plot was kind of refugia plants and sub-plots was Nano silica fertilizer concentration. The observed variables included plant height, stem diameter, number of leaves and number of branches, observations were made at the age of 14, 21, 28 and 35 days after planting (dap). The results showed that refugia plants had no effect on soybean growth, while the application of Nano silica fertilizer concentration of 1.75 ml/l and 3.50 ml/l gave the best effect on all components of soybean growth observed.","PeriodicalId":305822,"journal":{"name":"Proceedings of the International Conference on Agriculture, Social Sciences, Education, Technology and Health (ICASSETH 2019)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122399200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：