| Title |
Experimental Study on the Strength and Vibrational Properties of Polymer Latex Modified Cement Mortar |
| Authors |
임성배(Im, Seong-Bae) ; 한찬훈(Haan, Chan-Hoon) ; 이득행(Lee, Deuck-Hang) ; 이창준(Lee, Chang-Joon) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.6.289 |
| Keywords |
Damping Ratio; Strength; Dynamic Young's Modulus; Impact Hammer Test; Age; Polymer Latex Modified Cement Mortar |
| Abstract |
Ultraprecise lithography machines in semiconductor fabrication facilities are experiencing product quality issues caused by micro-vibrations
within structural elements. In response, several studies have focused on developing cementitious materials with enhanced damping properties
through polymer modification, particularly for use in floor slabs. This study examines the strength and vibrational characteristics of cement
mortar modified with styrene-butadiene rubber (SBR) latex. Two types of SBR latex, identical in monomer composition but differing in glass
transition temperatures, SBR-L (Tg : -1.2 °C) and SBR-H (Tg : 11.3°C), were incorporated at polymer-to-cement (P/C) ratios of 5%, 10%,
and 20%. Flexural and compressive strength tests were conducted, along with impact hammer tests to assess vibrational properties. Specimens
were prepared in sizes of 40×40×160 mm and 40×40×600 mm and tested after 28 days of curing. Additional 40×40×160 mm specimens
were evaluated at various curing ages up to 28 days to investigate age-dependent performance. Results indicated that the damping ratio varied
significantly with the type of SBR latex used. While compressive strength decreased compared to plain mortar, flexural strength generally
improved. With increasing curing age, the damping ratio declined, while the dynamic modulus increased. Overall, polymer modification
enhanced damping performance but reduced the dynamic modulus. |