楊長(zhǎng)輝++楊凱++潘群++陳科++朱效宏



摘要:
通過(guò)系統(tǒng)研究各配制參數(shù)(如:堿組分、水膠比、膠凝材料用量等)對(duì)堿礦渣混凝土28 d抗壓強(qiáng)度的影響,深入分析了28 d抗壓強(qiáng)度分布規(guī)律與方差間的關(guān)系。結(jié)果表明:堿礦渣混凝土28 d抗壓強(qiáng)度符合正態(tài)分布,且與水膠比呈明顯反比關(guān)系。在此基礎(chǔ)上,提出了適用于堿礦渣混凝土的回歸方程,確定了公式中回歸系數(shù)αa和αb分別為0.796和0.897,得出了堿礦渣混凝土配合比參數(shù)選擇與設(shè)計(jì)的具體方法。
關(guān)鍵詞:
堿礦渣混凝土; 抗壓強(qiáng)度; 抗壓強(qiáng)度方差; 回歸分析
Abstract:
This paper examined the effects of crucial parameters, including W/B, binder content, alkali component, on compressive strength of alkaliactivated slag concrete. Based on results obtained, the statistical distribution and variance (standard deviation) of compressive strength results were estimated, and the analysis results from experimental data indicated that the compressive strengths of AASC at the age of 28 day fitted normal distribution and is inversely proportional to the liquidsolid ratio. The relationship between W/B and compressive strength was established through regression analysis, the regression coefficient of formula αa and αb is 0.796 and 0.897 respectively. As such, a simple mix design method for alkaliactivated slag concrete was proposed.
Keywords:
alkaliactivated slag concrete; compressive strength; standard deviation of compressive strength; regression analysis
中國(guó)在工業(yè)現(xiàn)代化的進(jìn)程中每年有超過(guò)10億t的工業(yè)廢渣排放,而綜合利用率不足40%,累積存達(dá)64億t。這些工業(yè)廢渣大多為低活性鋁硅酸鹽材料,是一類(lèi)可再利用資源,能夠用于制備不同類(lèi)型膠凝材料和摻合料[13]。其中,以化學(xué)原理設(shè)計(jì)制備的無(wú)熟料水泥〖XC半字線.tif,JZ〗堿礦渣水泥多年來(lái)被受關(guān)注[2,45]??蒲腥藛T對(duì)堿礦渣水泥及混凝土的水化機(jī)理、力學(xué)性能、變形規(guī)律、耐久性能等諸多方面進(jìn)行了大量研究,取得了豐碩成果[2, 612]。研究表明,堿礦渣水泥在制備過(guò)程中排放的“溫室氣體”僅為普通硅酸鹽水泥的10%,單位產(chǎn)品生產(chǎn)能耗只是傳統(tǒng)水泥的30%左右,同時(shí),該材料具有早強(qiáng)、高強(qiáng)、低水化熱、高抗凍和優(yōu)良的抵抗化學(xué)浸蝕的性能,特別適用于Cl-、SO2-4等強(qiáng)腐蝕環(huán)境,例如:大壩工程、防輻射工程、有毒廢棄物的處置與治理等[2, 4, 68],因此,屬于環(huán)保、低碳、高性能膠凝材料,極具開(kāi)發(fā)潛力。
然而,由于堿組份種類(lèi)復(fù)雜……