本文關(guān)鍵詞：建筑垃圾再生骨料干粉砂漿的制備和性能研究　出處：《濟(jì)南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 建筑垃圾 再生骨料 干粉砂漿 力學(xué)性能 耐久性能

【摘要】：我國是處于城市化全面發(fā)展的階段，每年我國因?yàn)榕f房拆遷及建造新房而產(chǎn)生大量的建筑垃圾，大部分垃圾都是直接堆放在露天或只是簡單的填埋處理，對(duì)生態(tài)環(huán)境造成了嚴(yán)重破壞，建筑垃圾的再生資源化利用愈加緊迫。中國干粉砂漿的發(fā)展現(xiàn)狀與發(fā)達(dá)國家相比差距較大，沒有形成系統(tǒng)的基本機(jī)理理論研究，且有些砂漿配比的基本規(guī)律也未摸清。本文綜合考慮建筑垃圾資源化的重要性和干粉砂漿取代現(xiàn)場拌制砂漿的必要性兩方面的問題，利用建筑垃圾再生骨料生產(chǎn)干粉砂漿。 本文主要研究內(nèi)容包括：比較了再生骨料與天然河砂的基本物理性能，包括表觀密度、孔隙率和吸水率等。以復(fù)合激發(fā)劑和界面增強(qiáng)劑對(duì)建筑垃圾再生骨料干粉砂漿進(jìn)行改性，系統(tǒng)研究了復(fù)合激發(fā)劑和界面增強(qiáng)劑對(duì)干粉砂漿力學(xué)性能和砂漿界面結(jié)合情況的影響。研究了粉煤灰、羧甲基纖維素保水劑、萘系高效減水劑等對(duì)再生骨料干粉砌筑砂漿各項(xiàng)性能的影響和作用機(jī)理；研究了鋼渣、硅灰、保水劑和減水劑等對(duì)再生骨料干粉抹灰砂漿性能的影響及作用機(jī)理；研究了粉煤灰、硅灰、保水劑和減水劑等對(duì)再生骨料干粉地面砂漿各項(xiàng)性能的影響和作用機(jī)理。 實(shí)驗(yàn)研究表明，再生骨料的表觀密度遠(yuǎn)小于天然河砂，孔隙率和吸水率比天然河砂大，再生骨料干粉砂漿的力學(xué)性能優(yōu)于天然河砂干粉砂漿。復(fù)合激發(fā)劑可激發(fā)再生骨料中具有潛在膠凝活性的組分，同時(shí)可激發(fā)粉煤灰的活性，提高干粉砂漿的力學(xué)性能，比未摻加復(fù)合激發(fā)劑時(shí)28d抗壓強(qiáng)度提高了5.93%。界面增強(qiáng)劑中的極性基團(tuán)抑制游離水的擴(kuò)散，改善界面層的結(jié)合情況，提高干粉砂漿的力學(xué)性能，比未摻加界面增強(qiáng)劑時(shí)28d抗壓強(qiáng)度提高了8.71%。M10再生骨料干粉砌筑砂漿的最佳原料配比選擇為：灰料比為1:5.0，粉煤灰摻量為25%，復(fù)合激發(fā)劑摻量為0.9%，界面增強(qiáng)劑摻量為1.2%，保水劑摻量為0.24%，減水劑摻量為1.2%，滿足GB/T25181-2010《預(yù)拌砂漿》中對(duì)M10干粉砌筑砂漿各項(xiàng)性能的要求。 加入羧甲基纖維素保水劑后，再生骨料干粉抹灰砂漿的收縮性能得到明顯改善，在保水劑摻量為0.12%時(shí)，28d收縮率為1.56‰。M15再生骨料干粉抹灰砂漿的最佳原料配比選擇為：灰料比1:4.0，鋼渣摻量為18%，，硅灰摻量為4%，鋼渣激發(fā)劑摻量為0.5%，復(fù)合激發(fā)劑0.9%，界面增強(qiáng)劑1.2%，保水劑0.15%，減水劑為1.5%，滿足GB/T25181-2010《預(yù)拌砂漿》中對(duì)M15干粉抹灰砂漿各項(xiàng)性能的要求。 再生骨料干粉地面砂漿在摻入萘系高效減水劑時(shí)，抗凍性能得到了一定程度的改善，減水劑摻量為1.2%時(shí)，再生骨料干粉地面砂漿的抗凍標(biāo)號(hào)為D35，試樣經(jīng)35次凍融循環(huán)后，其質(zhì)量損失為2.45%，強(qiáng)度損失為17.37%。M20再生骨料干粉地面砂漿的最佳原料配比選擇為：灰料比為1:4.5，粉煤灰摻量為25%，硅灰摻量為4%，復(fù)合激發(fā)劑摻量為0.9%，界面增強(qiáng)劑摻量為1.2%，保水劑摻量為0.12%，減水劑摻量為1.2%，滿足GB/T25181-2010《預(yù)拌砂漿》中對(duì)M20干粉地面砂漿各項(xiàng)性能的要求。
[Abstract]:Our country is in the stage of comprehensive development of the city, every year in China because the demolition of old and new buildings and produce large amounts of construction waste, most of the garbage are piled up in the open air or just simple landfill disposal, causing serious damage to the ecological environment, renewable resources construction waste utilization is even more pressing. The current situation of the development of Chinese powder of the large gap compared with developed countries, there is no theoretical research on the basic mechanism of the system, and some basic rules did not find out the mortar ratio. In this paper, considering the importance of construction waste recycling and dry mortar to replace the two necessary on-site mixing mortar of recycled aggregate mortar production, utilization of construction waste.
The main contents of this paper include: the basic physical properties between recycled aggregate and natural sand, including apparent density, porosity and water absorption rate. The compound activator and interfacial agent on reinforced recycled aggregate mortar modified system of composite excitation agent and interfacial agent on properties of mortar and reinforced effect the interfacial mechanical dry mortar combination of fly ash, carboxymethyl cellulose superabsorbent, naphthalene superplasticizer on recycled aggregate dry mortar performance and mechanism of silica fume; steel slag, water retaining agent and water reducing agent on the influence of recycled aggregate dry plaster performance and mechanism; Study on the fly ash, silica fume, water retaining agent and water reducing agent on the performance of recycled aggregate mortar powder ground and the mechanism.
Experimental results show that the apparent density is much smaller than the natural river sand, porosity and water absorption ratio of natural river sand, aggregate mortar regenerated better mechanical properties than natural sand mortar. Composite activator may have potential cementitious activation in Recycled Aggregate Fractions, and can stimulate the activity of fly ash. To improve the mechanical properties of dry mortar, than adding composite activator 28d compressive strength increased by 5.93%. interface diffusion enhancement agent in the inhibition of polar groups in free water, improve the combination of interface layer, improve the performance of the mortar, than not adding interface reinforcing agent 28d compressive strength increased by 8.71%.M10 regeneration aggregate dry powder mortar is the best ratio of raw materials: grey powder ratio was 1:5.0, with 25% fly ash, compound activator dosage is 0.9%, the interface strengthening agent content is 1.2%, water content is 0.24% The amount of water reducing agent is 1.2%, which meets the requirements of GB/T25181-2010< premixed mortar > M10 dry powder masonry mortar.
Adding carboxymethyl cellulose superabsorbent, dry shrinkage of mortar plastering of recycled aggregate has been significantly improved, in water content is 0.12%, 28d contraction rate was 1.56 per thousand.M15 recycled aggregate mortar powder for the best ratio of raw materials: grey powder is 1:4.0, 18% steel slag, silica fume was 4% steel slag, activator content is 0.5%, 0.9% compound activator, interface enhancer 1.2%, water 0.15%, water reducing agent is 1.5%, meet the requirements of the M15 properties of GB/T25181-2010< dry powder mortar mortar >.
Dry powder mortar of recycled aggregate ground in the incorporation of naphthalene superplasticizer, the frost resistance has been improved to a certain extent, superplasticizer is 1.2%, the frost resistance grade of recycled aggregate mortar powder ground is D35, after 35 freeze-thaw cycles, the mass loss was 2.45% and the strength loss of 17.37%.M20 regeneration dry powder mortar aggregate ground for the best ratio of raw materials: grey powder ratio was 1:4.5, with 25% fly ash, silica fume was 4%, compound activator dosage is 0.9%, the interface strengthening agent content is 1.2%, water content is 0.12%, superplasticizer is 1.2%, meet the requirements of M20 powder the surface properties of GB/T25181-2010< mortar mortar >.

【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU578.1;X799.1

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本文編號(hào)：1370089