試驗研究 2023年 第52卷 第22期
DOI: 10. 7672 / sgjs2023220001
橡膠混凝土抗凍性最佳橡膠取代率試驗研究
楊馨鈺,蘇有文,劉術梅,唐 琪,高夢秋
作者簡介：
楊馨鈺,本科在讀,E-mail:823985310@ qq.com作者單位：
(西南科技大學土木工程與建筑學院,四川 綿陽 621010)基金項目：
?國家自然科學基金面上項目(41971214);西南科技大學大學生創新基金項目(CX22-091)摘要：
橡膠顆粒取代部分細骨料,可改善混凝土的抗凍性能。 試驗采用橡膠顆粒等體積取代普通混凝土中的天然砂,基于力學性能對比分析不同凍融階段質量損失率、相對動彈性模量隨取代率的變化曲線,以確定抗凍性能最佳取代范圍。 結果表明:隨著橡膠取代率的增加,質量損失率先減后增,而相對動彈性模量先增后減,抗凍性能均經歷先增長后下降的變化過程,即各自存在抗凍性能相對最優的取代區間,求交集可得橡膠混凝土抗凍性能最佳的取代范圍。
English：
Replacing part of fine aggregate with rubber particles can improve the frost resistance ofconcrete. In the test, rubber particles were used to replace the natural sand in ordinary concrete in equalvolume. Based on the mechanical properties, the mass loss rate and relative dynamic elastic modulus ofdifferent freeze-thaw stages were compared and analyzed with the replacement rate to determine the bestreplacement range of frost resistance. The results show that with the increase of rubber replacement rate,the mass loss first decreases and then increases, while the relative dynamic elastic modulus first increasesand then decreases, and the frost resistance first increases and then decreases, that is, there is arelatively optimal replacement interval for frost resistance, and the best replacement range for frostresistance of rubber concrete can be obtained by intersection.