TY - JOUR
T1 - Accelerated Curing for Glass-Based Mortars Using Water at 80 °C
AU - Ye, Taohua
AU - Lu, Jianxin
AU - Duan, Zhenhua
AU - Li, Lei
AU - Zhu, Dayu
N1 - Funding Information:
Funding: This research was funded by the National Natural Science Foundation of China (grant number: 52178244), the Shanghai Natural Science Fund (grant number: 21ZR1465000) and the Systematic Project of Guangxi Key Laboratory of Disaster Prevention and Engineering Safety (grant number: 2021ZDK009).
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - The substitution of river sand with glass aggregate (GA) and cement with glass powder (GP) is a mainstream method to recycle waste glass. Traditionally, standard curing was widely used for glass-based mortars. However, it is time-consuming and cannot address low mechanical strengths of the early-age mortars. Therefore, the effect of water curing at 80 °C on the properties of GA mortars is investigated. Furthermore, the effect of the GP size is also considered. Results show that compared with the expansion of alkali-silica reaction (ASR), water curing at 80 °C has a negligible effect on the volume change. Moreover, the compressive strength of GA mortars under 1-day water curing at 80 °C is comparable with that under 28-day water curing at 20 °C. Therefore, the 1-day water curing at 80 °C is proposed as an accelerated curing method for GA mortars. On the other hand, the addition of GP with the mean size of 28.3 and 47.9 µm can effectively mitigate the ASR expansion of GA mortars. Compared with the size of 28.3 µm, GA mortars containing GP (47.9 µm) always obtain higher compressive strength. In particular, when applying the 1-day water curing at 80 °C, GA mortars containing GP (47.9 µm) can even gain higher strength than those containing fly ash.
AB - The substitution of river sand with glass aggregate (GA) and cement with glass powder (GP) is a mainstream method to recycle waste glass. Traditionally, standard curing was widely used for glass-based mortars. However, it is time-consuming and cannot address low mechanical strengths of the early-age mortars. Therefore, the effect of water curing at 80 °C on the properties of GA mortars is investigated. Furthermore, the effect of the GP size is also considered. Results show that compared with the expansion of alkali-silica reaction (ASR), water curing at 80 °C has a negligible effect on the volume change. Moreover, the compressive strength of GA mortars under 1-day water curing at 80 °C is comparable with that under 28-day water curing at 20 °C. Therefore, the 1-day water curing at 80 °C is proposed as an accelerated curing method for GA mortars. On the other hand, the addition of GP with the mean size of 28.3 and 47.9 µm can effectively mitigate the ASR expansion of GA mortars. Compared with the size of 28.3 µm, GA mortars containing GP (47.9 µm) always obtain higher compressive strength. In particular, when applying the 1-day water curing at 80 °C, GA mortars containing GP (47.9 µm) can even gain higher strength than those containing fly ash.
KW - Accelerated curing
KW - Compressive Strength
KW - Glass aggregate mortar
KW - Glass powder size
KW - Volume stability
UR - http://www.scopus.com/inward/record.url?scp=85127496904&partnerID=8YFLogxK
U2 - 10.3390/ma15062109
DO - 10.3390/ma15062109
M3 - Journal article
AN - SCOPUS:85127496904
SN - 1996-1944
VL - 15
JO - Materials
JF - Materials
IS - 6
M1 - 2109
ER -