A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effects of the stearic acid modified mica powder on hydrophobic properties and salt freezing resistance of mortar: Experimental study and microscopic mechanism analysis
https://orcid.org/0000-0001-5747-7780
Abstract In this study, a novel hydrophobic modifier was developed to improve the durability of cement-based material without substantially reducing its compressive strength, which was prepared by ball grinding of the stearic acid and mica powder. Firstly, the effects of the stearic acid dosage on the water contact angle, stearic acid coating state and bonding mode between the stearic acid and mica powder of the stearic acid modified mica powder (SAM) were studied. Subsequently, a series of tests were conducted to investigate the effects of the SAM content on water absorption, water contact angle, compressive strength and salt freezing resistance of the mortar. Under salt freezing environment, the axial compressive properties of SAM modified mortar were tested in detail, including failure mode and stress-strain curve, and a salt freezing damage calculation model considering the effects of the SAM content and salt freezing cycle was established by introducing the damage factor. Finally, the effect mechanisms of the SAM on the compressive strength, water absorption and salt freezing corrosion resistance of the mortar were revealed by using the infrared spectrum, energy spectrum, scanning electron microscope and mercury injection test.
Highlights A novel hydrophobic modifier was developed to improve the durability of cement-based material. The micro-mechanism of SAM on hydrophobic modification of mortar was systematically revealed. Some basic research data for the application of the SAM in civil engineering were provided.
Effects of the stearic acid modified mica powder on hydrophobic properties and salt freezing resistance of mortar: Experimental study and microscopic mechanism analysis
https://orcid.org/0000-0001-5747-7780
Abstract In this study, a novel hydrophobic modifier was developed to improve the durability of cement-based material without substantially reducing its compressive strength, which was prepared by ball grinding of the stearic acid and mica powder. Firstly, the effects of the stearic acid dosage on the water contact angle, stearic acid coating state and bonding mode between the stearic acid and mica powder of the stearic acid modified mica powder (SAM) were studied. Subsequently, a series of tests were conducted to investigate the effects of the SAM content on water absorption, water contact angle, compressive strength and salt freezing resistance of the mortar. Under salt freezing environment, the axial compressive properties of SAM modified mortar were tested in detail, including failure mode and stress-strain curve, and a salt freezing damage calculation model considering the effects of the SAM content and salt freezing cycle was established by introducing the damage factor. Finally, the effect mechanisms of the SAM on the compressive strength, water absorption and salt freezing corrosion resistance of the mortar were revealed by using the infrared spectrum, energy spectrum, scanning electron microscope and mercury injection test.
Highlights A novel hydrophobic modifier was developed to improve the durability of cement-based material. The micro-mechanism of SAM on hydrophobic modification of mortar was systematically revealed. Some basic research data for the application of the SAM in civil engineering were provided.
Effects of the stearic acid modified mica powder on hydrophobic properties and salt freezing resistance of mortar: Experimental study and microscopic mechanism analysis
https://orcid.org/0000-0001-5747-7780
Abstract In this study, a novel hydrophobic modifier was developed to improve the durability of cement-based material without substantially reducing its compressive strength, which was prepared by ball grinding of the stearic acid and mica powder. Firstly, the effects of the stearic acid dosage on the water contact angle, stearic acid coating state and bonding mode between the stearic acid and mica powder of the stearic acid modified mica powder (SAM) were studied. Subsequently, a series of tests were conducted to investigate the effects of the SAM content on water absorption, water contact angle, compressive strength and salt freezing resistance of the mortar. Under salt freezing environment, the axial compressive properties of SAM modified mortar were tested in detail, including failure mode and stress-strain curve, and a salt freezing damage calculation model considering the effects of the SAM content and salt freezing cycle was established by introducing the damage factor. Finally, the effect mechanisms of the SAM on the compressive strength, water absorption and salt freezing corrosion resistance of the mortar were revealed by using the infrared spectrum, energy spectrum, scanning electron microscope and mercury injection test.
Highlights A novel hydrophobic modifier was developed to improve the durability of cement-based material. The micro-mechanism of SAM on hydrophobic modification of mortar was systematically revealed. Some basic research data for the application of the SAM in civil engineering were provided.
Effects of the stearic acid modified mica powder on hydrophobic properties and salt freezing resistance of mortar: Experimental study and microscopic mechanism analysis
Yang, Lin (author) / Pang, Yuyang (author) / Tang, Qun (author) / Chen, Xiaohui (author) / Gao, Danying (author) / Li, Haofei (author) / Wang, Hailiang (author)
2024-01-23
Article (Journal)
Electronic Resource
English
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