TY - JOUR
T1 - Scrutinizing the Effect of Water Temperature on the Compressive Strength of Recycled Concrete
AU - Iskandar, Dadang
AU - Hadijah, Ida
AU - Hadiwardoyo, Sigit P.
AU - Wati, Novia Lumintu
AU - Kurniawan, Septyanto
N1 - Funding Information:
This research was supported by the 2022 Higher Education Excellence Basic Research Grant (PDUPT) funded by the Directorate of Technology Research and Community Service (DRTPM). The author would like to thank various parties who have helped the success of the research, especially the Institute for Research and Community Service (LPPM) Universitas Muhammadiyah Metro, Contract Number 099/II.AU/C/LPPM/2022. The author also thanks the Laboratory of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Metro.
Funding Information:
The ANOVA result of a CRD shows that the P-Value for the temperature and RCA factors is 0.000 and 0.042<0.05, respectively, and 0.020<0.05 for the combined factors. This research was supported by the 2022 Higher Therefore, it can be concluded that these three factors Education Excellence Basic Research Grant (PDUPT) influence each other. funded by the Directorate of Technology Research and The Tukey’s advanced test, which compares Community Service (DRTPM). The author would like to compressive strength with temperature, as shown in Figure thank various parties who have helped the success of the 13, and with RCAin Figure14 using a 95% confidence research, especially the Institute for Research and level, indicates that 60-栀Cn da 100-栀C temperatures have the Community Service (LPPM) Universitas Muhammadiyah same effecton compressive strength. Metro, Contract Number 099/II.AU/C/LPPM/2022. The author also thanks the Laboratory of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Metro.
Publisher Copyright:
© 2023 by authors. All rights reserved.
PY - 2023/7
Y1 - 2023/7
N2 - After demolishing rigid roads and old buildings, concrete is often rendered worthless and thrashed as waste. Currently, sustainable concrete construction is very popular, and the goal of the industry is to protect the population’s well-being by reducing CO2 emissions and encouraging the effective use of natural resources. One of the causes of decreased quality of recycled products is the adherence of cement paste to concrete demolition. Therefore, this study aims to examine the effect of water temperature on the compressive strength of recycled concrete. This is carried out with the hope that water temperature can impact the disintegration of the cement paste in the demolition concrete, thereby strengthening the bond between aggregates. The water temperature applied in this study was 25oC, 60oC, and 100oC, while the levels of recycled concrete aggregate (RCA) used were 25%, 50%, and 80%. The results showed that the highest compressive strength was obtained with an average of 26.23 MPa at a water temperature of 25oC and 25% RCA. However, this value is still below the composition of the natural aggregate, which is 28.6 MPa. Due to the rapid hydration caused by the high-water temperature, the process of forming concrete on the surface is accelerated while the interior remains weak. This situation affects the weakening of the compressive strength of concrete. Furthermore, this study shows that high water temperatures are beneficial for the cement paste decay process in recycled aggregates, but it is best to use a normal temperature of 25oC when mixing the water.
AB - After demolishing rigid roads and old buildings, concrete is often rendered worthless and thrashed as waste. Currently, sustainable concrete construction is very popular, and the goal of the industry is to protect the population’s well-being by reducing CO2 emissions and encouraging the effective use of natural resources. One of the causes of decreased quality of recycled products is the adherence of cement paste to concrete demolition. Therefore, this study aims to examine the effect of water temperature on the compressive strength of recycled concrete. This is carried out with the hope that water temperature can impact the disintegration of the cement paste in the demolition concrete, thereby strengthening the bond between aggregates. The water temperature applied in this study was 25oC, 60oC, and 100oC, while the levels of recycled concrete aggregate (RCA) used were 25%, 50%, and 80%. The results showed that the highest compressive strength was obtained with an average of 26.23 MPa at a water temperature of 25oC and 25% RCA. However, this value is still below the composition of the natural aggregate, which is 28.6 MPa. Due to the rapid hydration caused by the high-water temperature, the process of forming concrete on the surface is accelerated while the interior remains weak. This situation affects the weakening of the compressive strength of concrete. Furthermore, this study shows that high water temperatures are beneficial for the cement paste decay process in recycled aggregates, but it is best to use a normal temperature of 25oC when mixing the water.
KW - Compressive Strength
KW - Recycled Concrete
KW - Sustainability
KW - Water Temperature
UR - http://www.scopus.com/inward/record.url?scp=85161469592&partnerID=8YFLogxK
U2 - 10.13189/cea.2023.110403
DO - 10.13189/cea.2023.110403
M3 - Article
AN - SCOPUS:85161469592
SN - 2332-1091
VL - 11
SP - 1668
EP - 1678
JO - Civil Engineering and Architecture
JF - Civil Engineering and Architecture
IS - 4
ER -