【正文】 我國(guó) 2SO 排放總量必須控制在 2300 萬噸以內(nèi)。據(jù)《中國(guó)環(huán)境狀況公報(bào)》，我國(guó)從 2020年到 2020 年， 2SO 排放量依次為 、 、 和 2468 萬噸，“十五”末的 2SO 超過國(guó)家“十五”控制目標(biāo) (1800 萬噸 ) 萬噸，形勢(shì)十分嚴(yán)峻。目前，我國(guó)的石膏儲(chǔ)量和可利用石膏量由表 11 給出，而脫硫石膏利用率僅為 30％，大量脫硫石膏被堆放或填海，不僅占用大量土地，而且脫出來的硫又回到地面，造成二次污染形成酸雨，酸雨是當(dāng)今全球十大環(huán)境問題之一，燃煤煙氣排放的 2SO 、 XNO 是酸雨的主要成因。 普通硅酸鹽水泥摻量對(duì)自流平砂漿性能的影響 .......................................... 24 硫鋁酸鹽水泥水化機(jī)理 ............................................................................. 25 硫鋁酸鹽水泥摻量對(duì)自流平砂漿性能的影響 ............................................. 26 粉煤灰摻量對(duì)自流平砂漿性能的影響 ........................................................ 27 脫硫石膏摻量對(duì)自流平砂漿性能的影響 .................................................... 28 攪拌方式對(duì)自流平砂漿性能的影響 .................................................................... 30 養(yǎng)護(hù)條件對(duì)自流平砂漿凝結(jié)時(shí)間的影響 ............................................................. 31 養(yǎng)護(hù)條件對(duì)砂漿力學(xué)性能的影響 ....................................................................... 31 4 試驗(yàn)結(jié)果與分析 ........................................................................................................ 33 結(jié)果分析 .......................................................................................................... 33 XRD 分析 ................................................................................................ 33 5 結(jié)論與展望 ............................................................................................................... 36 結(jié)論 ................................................................................................................. 36 展望 ................................................................................................................. 37 致謝 ............................................................................................................................... 38 參考文獻(xiàn) ........................................................................................................................ 39 1 1 緒論 研究的背景與意義 截至 2020 年年底，我國(guó)火電廠建成投產(chǎn)的脫硫機(jī)組容量達(dá) 億千瓦，年產(chǎn)出脫硫石膏達(dá) 4000 萬噸。 mechanical properties。 selfleveling mortar。 1 ℃ , relative humidity 90%), conservation of the natural environment of the 24h (temperature: 20 ℃177。 關(guān)鍵字 ：脫硫石膏；自流平砂漿；緩凝劑；力學(xué)性能；流變性能 IIExperimental study of FGD gypsum leveling mortar Abstract Flue gas desulphurization gypsum and FGD gypsum, sulfur and gypsum and FGD gypsum, is a sulfurcontaining fuels (mainly coal) postbustion flue gas desulphurization and purification process resulting from industrial byproduct gypsum. Them in the past have often been regarded as a casual openair waste stack or it will be filled out, not for the second time in a timely and effective manner, serious pollution of the atmospheric environment, waste of land resources, destruction of ecological balance, but also damage human health. Therefore, it is necessary for the development and utilization of desulphurization gypsum. This research study on desulphurization gypsum application in selfleveling mortar, preparation of gypsum based upon yourselves to materials. Meet under the requirements of national standard JC/T10232020 of gypsum based selfleveling mortar, determining desulphurization gypsum and fly ash and sulfur aluminates cement, Portland cement between the proportion of basic, through the research of retarder fly on the properties (the initial flow of water, 30min fluidity loss, condensed time, breaking strength, pressive strength, tensile bond strength, shrink ratio, etc.)of selfleveling mortar effect of, determine the appropriate rate of mixed. In addition research on curing system on the desulphurization performance of selfleveling mortar plaster effects. Test results showed that: retarders and mineral admixtures on the properties of gypsum based selfleveling mortar more, this article uses potassium citrate as a retarder, mixed in % to % would be appropriate for you, use of fly ash as admixture, studies have shown that when the content is 25%~30% range of selfleveling mortar fluidity and mechanical properties of the best, in addition there is a performance of the mortar is a relatively large impact conservation methods, in this document to determine if conservation methods are as follows: 24h release the natural environment (temperature: 20℃177。 試驗(yàn)結(jié)果表明：緩凝劑和摻合量對(duì)石膏基自流平砂漿性能的影響較大，本文采用檸檬酸鉀為緩凝劑，摻量在 %～ %時(shí)為宜；采用粉煤灰為摻合料，研究表明當(dāng)摻量為 25%～ 30%范圍內(nèi)時(shí)自流平砂漿的流動(dòng)性和力學(xué)性能最好。在滿足石膏基自流平砂漿國(guó)標(biāo) JC/T10232020 的要求下，確定脫硫石膏、粉煤灰、硫鋁酸鹽水泥、普通 硅酸鹽水泥之間的基本配比，通過研究緩凝劑摻量對(duì)自流平砂漿性能（初始流動(dòng)度用水、 30min 流動(dòng)度損失、凝結(jié)時(shí)間、抗折強(qiáng)度、抗壓強(qiáng)度、拉伸粘結(jié)強(qiáng)度、收縮率等）的影響，確定合適的摻率。因此，開發(fā)利用脫硫石膏很有必要。 I 脫硫石膏自流平砂漿的試驗(yàn)研究 摘要 脫硫石膏又稱排煙脫硫石膏、硫石膏或 FGD 石膏，是對(duì)含硫燃料（主要是煤）燃燒后產(chǎn)生的煙氣進(jìn)行脫硫凈化處理而得到的工業(yè)副產(chǎn)石膏。過去它們常常被當(dāng)作是廢棄物隨意的露天堆放或是將其填埋掉， 不能及時(shí)有效地進(jìn)行二次利用，嚴(yán)重地污染了大氣環(huán)境，浪費(fèi)了土地資源，使得生態(tài)平衡遭到破壞，同時(shí)也損害了人體健康。 本課題 研究了利用脫硫石膏制備自流平砂漿的相關(guān)技術(shù)。此外研究了養(yǎng)護(hù)制度對(duì)脫硫石膏自流平砂漿性能的影響。另外對(duì)砂漿性能有較大影響的是養(yǎng)護(hù)方法， 本文確定的養(yǎng)護(hù)方法如下： 24h 脫 模 ? 自然環(huán)境（溫度： 20℃ ?2℃，相對(duì)濕度 ?60%） 24h? 快速養(yǎng)護(hù)箱（溫度： 60℃ ?1℃，相對(duì)濕度 ?90%）養(yǎng)護(hù) 24h? 自然環(huán)境（溫度： 20℃ ?2℃，相對(duì)濕度 ?60%） 10d?置于 45℃烘箱 24h。 2℃ , relative humidity 60%) 24h rapid maintenance boxes (temperature: 60 ℃177。 2 ℃ , relative humidity 60%) 10d at 45 ℃ oven 24h. Key words: FGD gypsum。 retarder。 rheological properties. III 1 緒論 ........................................................................................................................... 1 研究的背景與意義 .............................................................................................. 1 國(guó)內(nèi) 外的研究現(xiàn)狀 .............................................................................................. 3 脫硫石膏 ................................................................................................... 3 脫硫石膏國(guó)內(nèi)外的研究現(xiàn)狀 ....................................................................... 6 石膏基自流平材料的國(guó)內(nèi)外研究 ......................................