本文選題：礦渣鋼渣復(fù)合 + 膠凝性能　； 參考：《暨南大學(xué)》2014年碩士論文

【摘要】：與礦渣相比，作為冶金渣之一的鋼渣，由于其存在早期活性及安定性等問題，致使其在水泥混凝土行業(yè)的利用價(jià)值并不高，導(dǎo)致冶金渣的綜合附加值未能達(dá)到最大化。為了進(jìn)一步加大冶金渣的綜合利用率，本文將礦渣鋼渣磨細(xì)后進(jìn)行復(fù)合，針對礦渣鋼渣復(fù)合膠凝特性及其用于海工環(huán)境進(jìn)行了試驗(yàn)研究，主要內(nèi)容如下： （1）礦渣、鋼渣基本性質(zhì)的研究。結(jié)果表明：鋼渣化學(xué)組成與水泥較為相似，擁有潛在的膠凝活性，另通過堿度計(jì)算，可以判斷試驗(yàn)用鋼渣為高鈣渣，從化學(xué)組成來看，試驗(yàn)用礦渣為酸性渣，質(zhì)量系數(shù)為2.03，有較高的活性基礎(chǔ)；在粉磨性能方面，鋼渣較礦渣易磨，但鋼渣難磨相較礦渣多，且二者磨細(xì)粉的過篩（0.08mm）微粒徑范圍要優(yōu)于水泥，具備摻合料的物理填充基礎(chǔ)。 （2）礦渣粉、鋼渣粉單摻及復(fù)摻對膠砂性能的研究。結(jié)果表明：單摻摻量25%時(shí)，礦渣粉和鋼渣粉比表面積分別在430m2/kg、584m2/kg左右，其在能耗和活性方面能達(dá)到了較好地結(jié)合；在單摻摻量方面，礦渣粉在70%摻量時(shí)亦能保證其后期活性，而鋼渣粉最大摻量不宜超過20%；在復(fù)摻方面，若參考一級鋼渣粉的行業(yè)標(biāo)準(zhǔn)，，礦渣鋼渣復(fù)合微粉總摻量分別為40%和50%時(shí)，其中鋼渣粉所占比例不宜超過60%和50%；利用三種激發(fā)劑進(jìn)行激發(fā)效能對比，其在7d和28d表現(xiàn)出了正負(fù)激發(fā)效果，表現(xiàn)為無水硫酸鈣激發(fā)效果和穩(wěn)定性最好，氫氧化鈣次之，硅鋁酸鈉不宜單獨(dú)作為激發(fā)劑。此外，礦渣粉、鋼渣粉的單摻及復(fù)摻均能保證膠砂具有較優(yōu)的流動性。 （3）礦渣粉、鋼渣粉單摻及復(fù)摻對水泥水化產(chǎn)物組成及微結(jié)構(gòu)的研究。結(jié)果表明：單摻及復(fù)摻入水泥的水化產(chǎn)物組成成分大致相同；相比礦渣粉，鋼渣粉在水化達(dá)到后期時(shí)才逐漸展露其活性；凈水泥漿石的微裂紋較多，而摻入50%復(fù)合微粉的水泥漿石在微裂紋較凈水泥漿石明顯要少，其微孔洞較單摻礦渣粉要較略少，說明了二者的復(fù)合在微觀上具備一定的協(xié)調(diào)效應(yīng)。2.5%的無水硫酸鈣摻入，可以減少復(fù)合微粉-水泥漿石的微孔洞。 （4）礦渣粉、鋼渣粉、粉煤灰相互復(fù)合摻入對混凝土力學(xué)及工作性能的研究。結(jié)果表明：微粉復(fù)合后摻入混凝土對其工作性能總體有利；在強(qiáng)度方面，礦渣粉與鋼渣粉復(fù)合要優(yōu)于礦渣粉與粉煤灰復(fù)合，在28d活性基本與單摻礦渣粉無異。高活性品種礦渣粉對礦渣鋼渣復(fù)合微粉早期活性影響較大，后期基本無異；礦渣粉與鋼渣粉在高水膠比下復(fù)合活性協(xié)調(diào)效應(yīng)較低水膠比更易發(fā)揮；單摻無水硫酸鈣作為礦渣鋼渣復(fù)合微粉的激發(fā)劑以2%摻量為宜，無水硫酸鈣和氫氧化鈣作為復(fù)合激發(fā)劑時(shí)，未能發(fā)揮復(fù)合激發(fā)效果。 （5）礦渣粉、鋼渣粉、粉煤灰相互復(fù)合摻入混凝土在海工環(huán)境耐久性的研究。微粉在各總摻量及各復(fù)合比例下?lián)饺牖炷�，通過其耐海工環(huán)境的5項(xiàng)試驗(yàn)結(jié)果表明：其摻入可以改善在混凝土抗氯離子滲透性能方面，提高幅度在10%~43%之間，礦渣粉與鋼渣粉復(fù)合優(yōu)于礦渣粉與粉煤灰復(fù)合，且均優(yōu)于單摻礦渣粉的改善效果；其摻入可以改善混凝土抗硫酸鹽腐蝕性能，最高提升幅度達(dá)到20%，礦渣粉和鋼渣粉或粉煤灰的復(fù)合均能優(yōu)于單摻礦渣粉對混凝土抗硫酸鹽性能的改善，復(fù)合微粉總摻量以40%為宜；其摻入可以改善混凝土抗人工海水腐蝕性能，最大提升幅度達(dá)到12%，在總摻量為30%時(shí)，礦渣粉與粉煤灰的復(fù)合較礦渣粉與鋼渣粉復(fù)合要好，但隨著總摻量增加至50%時(shí)，礦渣粉與鋼渣粉的復(fù)合效果基本與礦渣粉與粉煤灰的復(fù)合等效，但均優(yōu)于單摻礦渣粉的改善效果；其摻入可以改善混凝土早期開裂性能，總摻量為50%時(shí)，以礦渣粉和鋼渣粉復(fù)合效果最優(yōu)，礦渣粉與粉煤灰復(fù)合次之，單摻礦渣粉最弱；對于混凝土耐磨性能方面，礦渣粉的摻入不利于混凝土耐磨，而其與鋼渣粉或粉煤灰復(fù)合后可以改善此“危害”，但只有復(fù)合微粉總量達(dá)到50%時(shí)，才優(yōu)于未摻微粉的水泥混凝土。 本文的研究為利用礦渣、鋼渣制備復(fù)合微粉摻合料用于水泥混凝土行業(yè)的研究及推廣提供基礎(chǔ)，為礦渣鋼渣復(fù)合微粉相關(guān)應(yīng)用技術(shù)規(guī)范提供參考。
[Abstract]:Compared with slag, steel slag, as one of the metallurgical slag, has a low utilization value in the cement concrete industry because of its early activity and stability, which leads to the failure to maximize the comprehensive added value of the metallurgical slag. In order to further increase the comprehensive utilization ratio of metallurgical slag, the slag steel slag has been grinded in this paper. In view of the composite cementitious characteristics of slag steel slag and its application in marine environment, the main contents are as follows:
(1) research on the basic properties of slag and steel slag. The results show that the chemical composition of steel slag is similar to cement and has potential cementitious activity. By the calculation of alkalinity, it can be used to judge the test steel slag as high calcium slag. From the chemical composition, the slag is used as acid residue, the mass coefficient is 2.03, and has a higher activity base; in the grinding performance square. On the other hand, steel slag is easier to wear than slag, but steel slag is more difficult to wear than slag, and the size range of the two grinding powder is better than the cement and has the physical filling foundation of the admixture.
(2) study on the properties of slag powder, steel slag powder single addition and compound admixture. The results show that the specific surface area of slag powder and slag powder is about 430m2/kg and 584m2/kg, respectively, when the amount of single admixture is 25%, and its energy consumption and activity can be better combined, and the slag powder can also ensure its later activity in the addition of the dosage of 70%. The maximum dosage of slag powder should not exceed 20%. In the case of the industry standard of the first grade slag powder, the proportion of slag and slag powder is 40% and 50% respectively, and the proportion of slag powder should not exceed 60% and 50%, and the effect of positive and negative excitation on 7d and 28d shows the effect of positive and negative excitation by using three kinds of activator. The effect and stability of the anhydrous calcium sulfate are the best, the calcium hydroxide is the second, the sodium aluminosilicate should not be used alone as a activator. In addition, the slag powder, the single mixing and mixing of the slag powder can guarantee the better fluidity of the mortar.
(3) the study on the composition and microstructure of the hydration products of cement with slag powder, steel slag powder and compound admixture. The results show that the composition of the hydrated products is roughly the same, and the slag powder gradually shows its activity when the hydration reaches the later stage, and the micro crack of the net cement paste is more than that of the slag powder, and the 50% composite microcracks are mixed with the slag powder. The pulverized cement paste is less than the net cement paste, and the micropore cavity is less than the single slag powder. It shows that the composite calcium sulfate, which has a certain coordination effect of.2.5%, can reduce the micropore of the composite micropowder cement paste.
(4) the study of slag powder, slag powder and fly ash mixed with each other on the mechanical properties and working properties of concrete. The results show that the combination of micro powder and concrete is generally favorable to its working performance. In strength, the combination of slag powder and slag powder is better than that of slag powder and fly ash, and the activity of 28d is basically higher than that of single slag powder. The active variety slag powder has great influence on the early activity of the slag steel slag compound powder, and the later is basically the same. The slag powder and steel slag powder are more easy to play with the lower water gel ratio under the high water glue ratio. The 2% content of the activator with single calcium sulfate as the slag steel slag compound powder is suitable, the anhydrous calcium sulfate and the calcium hydroxide As a composite activator, the compound excitation effect can not be realized.
(5) research on the durability of slag powder, steel slag powder and fly ash mixed with concrete in the marine environment. Micro powder is mixed with concrete under the total content and the ratio of each compound. Through the 5 test results of its marine environment, it can improve the permeability of concrete to the chloride resistance, and increase the range between 10%~43% and mine. The combination of slag powder and slag powder is better than slag powder and fly ash, and it is better than single slag powder. The addition of slag powder can improve the sulfate corrosion resistance of concrete, the maximum lifting range is 20%. The compound of slag powder and slag powder or fly ash can be better than that of single slag powder to improve the sulfate resistance of concrete. The total addition of micro powder is 40%, which can improve the corrosion resistance of concrete to artificial seawater, the maximum lifting range is 12%. When the total content is 30%, the compound of slag powder and fly ash is better than slag powder and slag powder. But with the increase of total content to 50%, the compound effect of slag powder and slag powder is basically with slag powder and slag powder. The compound equivalent of fly ash is better than the improvement effect of single slag powder; its addition can improve the early cracking performance of concrete. When the total content is 50%, the combination of slag powder and slag powder is the best, the slag powder is mixed with the fly ash, and the single slag powder is the weakest; for the wear resistance of concrete, the admixing of slag powder is unfavorable. Concrete is wear-resistant, and it can be improved with steel slag powder or fly ash, but only when the total amount of composite powder reaches 50%, it is better than the cement concrete without fine powder.
The research in this paper provides a basis for the research and promotion of cement concrete industry by making use of slag and steel slag to prepare compound micro powder admixture for cement concrete industry. It provides reference for the related application technical specifications of slag steel slag composite micro powder.
【學(xué)位授予單位】：暨南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TV431

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐明述;;中國水泥混凝土工業(yè)發(fā)展現(xiàn)狀與展望[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年S2期

2 冷發(fā)光;馬孝軒;田冠飛;;混凝土抗硫酸鹽侵蝕試驗(yàn)方法[J];東南大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年S2期

3 呂麗華;柳俊哲;李玉順;劉彥書;;粉煤灰對混凝土路面耐磨性的影響[J];低溫建筑技術(shù);2006年03期

4 董超,謝葆青,林紅;高爐礦渣混凝劑處理有機(jī)廢水的研究[J];山東環(huán)境;2000年02期

5 石青;;美國鋼鐵渣工業(yè)的發(fā)展概況——鋼鐵渣綜合利用考察報(bào)告[J];硅酸鹽建筑制品;1980年04期

6 李彬,江景輝,隋智通;鋼渣組成與膠凝性能的研究[J];房材與應(yīng)用;1997年04期

7 孫家瑛;磨細(xì)鋼渣對混凝土力學(xué)性能及安定性影響研究[J];粉煤灰;2003年05期

8 薛明;劉曉旭;曹黎明;;復(fù)合礦物摻料對自密實(shí)混凝土耐鹽腐蝕性能影響的研究[J];粉煤灰;2008年02期

9 楊永民;葉雯;趙可昕;;礦物摻合料對水泥系統(tǒng)泌水性能的影響[J];粉煤灰綜合利用;2007年06期

10 張文淵;環(huán)境水對水泥混凝土的侵蝕作用及防護(hù)措施[J];腐蝕與防護(hù);2000年02期

本文編號：1984792