A、已達(dá)到規(guī)定的循環(huán)次數(shù) B、試件的相對(duì)動(dòng)彈性模量下降到60% C、試件抗壓強(qiáng)度損失率已達(dá)到25% D、試件質(zhì)量損失率已達(dá)到5%
A、冷凍時(shí)間不應(yīng)少于4h B、融化時(shí)間不應(yīng)少于4h C、冷凍時(shí)間不應(yīng)少于8h D、融化時(shí)間不應(yīng)少于8h