The effect of temperature and humidity treatment on the strength set of fine-grained concrete with the addition of saponite-containing material

• Published in: Nanotechnologies in Construction A Scientific Internet-Journal
• Main Author: Marina V. Morozova
• Format: Article in Journal/Newspaper
• Language: English; Russian
• Published: OOO "CNT «NanoStroitelstvo» 2024
• Subjects: saponite-containing material; steaming; temperature and humidity treatment; fine-grained concrete; highly dispersed additive; swelling; compressive strength; Building construction; TH1-9745; Arkhangelsk; Solovetsky; Solovetsky Islands
• Online Access: https://doi.org/10.15828/2075-8545-2024-16-3-227-234; https://doaj.org/article/3d411918818643eeaeaf7b85d12cd3c7

Introduction. To restore and develop the Solovetsky Islands road network concrete slabs could be used. Currently, compositions with additives of industrial waste, including micro- and nanoscale, are being actively introduced to improve the performance characteristics of the road slabs. For the Arkhangelsk region, saponite-containing waste from the mining industry could be used as a material. At the same time, one of the ways to accelerate the process of gaining strength of composites is steaming. However, studies related to the effect of temperature and humidity treatment on the hardening process of a composite with a highly dispersed saponite-containing material (SCM) have not been previously studied. It is known that the process of moisture sorption with a finely dispersed additive allows controlling structure formation during concrete hardening, improving its operational characteristics. However, under conditions of high humidity, the quantitative content of tempering water, calculated based on the value of water absorption of the SСM, can significantly change and affect the process of gaining the strength of the composite. Therefore, the purpose of this research is to study the effect of temperature and humidity treatment on the strength gain of fine-grained concrete with the addition of SCM. It has been established that the accelerated method of concrete hardening has only a positive effect on the formation of a strong and dense structure. However, in the case of using highly dispersed saponite-containing material as an additive, the opposite effect (decrease in strength) associated with sorption properties and features of its structure can be observed. Methods and Materials. The SCM recovered from the recycled water was dried to constant weight and dispersed on a planetary ball mill. Particle size was determined by dynamic and electrophoretic light scattering, and specific surface area was determined by nitrogen sorption (BET theory). The strength of samples of fine-grained concrete of the control and ...