Improving impact energy absorption capacity loss resistivity of thermally cycled cement pastes using a thermoset polymer additive

Öz

A modified silicone type thermoset polymer additive effect on impact energy absorption capacity (EAC) values of cement pastes exposed to thermal cycles in water was investigated with a series of Charpy impact tests. The thermoset type polymer (MSP) material was added with different amounts in the cement and water mixes. The polymeric additive used in this study was in liquid phase while adding into the fresh cement mix and started to solidify by polymerization after being mixed well in the cement paste. The MSP based product was selected to use because of its ability of polymerization in contact with water. Although EAC values of specimens cured under a constant temperature were found to slightly decrease, the strength loss due to thermal cycles was found to be much limited as a result of using the MSP type thermoset additive. Therefore, the additive tested in this study was assessed to improve the impact resistivity of the cement pastes and mortars against the thermal changes. Depending on the additive amount in the mix and thermal change details, MSP added specimens were determined to have notably higher EACs than those of the specimens with no polymer additive.

Anahtar Kelimeler

• impact energy
• thermosets
• charpy test

Improving Impact Energy Absorption Capacity Loss Resistivity Of Thermally Cycled Cement Pastes Using A Thermoset Polymer Additive

Öz

A modified silicone type thermoset polymer additive effect on impact energy absorption capacity (EAC) values of cement pastes exposed to thermal cycles in water was investigated with a series of Charpy impact tests. The thermoset type polymer (MSP) material was added with different amounts in the cement and water mixes. The polymeric additive used in this study was in liquid phase while adding into the fresh cement mix and started to solidify by polymerization after being mixed well in the cement paste. The MSP based product was selected to use because of its ability of polymerization in contact with water. Although EAC values of specimens cured under a constant temperature were found to slightly decrease, the strength loss due to thermal cycles was found to be much limited as a result of using the MSP type thermoset additive. Therefore, the additive tested in this study was assessed to improve the impact resistivity of the cement pastes and mortars against the thermal changes. Depending on the additive amount in the mix and thermal change details, MSP added specimens were determined to have notably higher EACs than those of the specimens with no polymer additive.

Anahtar Kelimeler

• charpy test
• thermosets
• impact energy

Kaynakça

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