本文選題：疏浚底泥 + 免燒陶粒�。� 參考：《天津科技大學(xué)》2017年碩士論文

【摘要】：隨著我國工業(yè)化進程以及疏浚量逐年增加,產(chǎn)生大量占地面積大、含水率高、組成成分復(fù)雜、容易產(chǎn)生二次污染的疏浚底泥。因此,探索疏浚底泥廢資源化利用的新途徑顯得尤為重要。本文研究致力于探索研究將疏浚底泥制備免燒磚,不僅能有效解決疏浚底泥處理難題,開發(fā)新型建筑材料,符合國家政策導(dǎo)向,同時可以節(jié)能利廢,保護我國土地資源,應(yīng)用前景廣泛。目前,利用疏浚底泥制備免燒磚尚無工業(yè)化報道,研究工作大多是將底泥與水泥等材料直接混合壓制成磚。直接摻入法制備的免燒磚存在強度低、耐水性能差、抗凍融性能差等一系列問題,基本無實際應(yīng)用價值。針對此問題,本文提出將疏浚底泥制備免燒陶粒,再與膠凝材料混合、壓制成免燒磚的新工藝,解決了底泥與膠凝材料的相容性問題。并針對疏浚底泥陶粒強度低、抗凍融性較差等問題,系統(tǒng)探討了陶粒的裹殼改性工藝,有效改善了陶粒各項性能。具體研究工作如下:陶粒裹殼改性的研究結(jié)果:(1)疏浚底泥免燒陶粒經(jīng)裹殼改性后,所制備的裹殼陶粒殼、核層結(jié)合緊密,能夠大幅提高疏浚底泥免燒陶粒的強度,性能應(yīng)符合GBT17431.1-2010《輕集料及其試驗方法》的標(biāo)準要求;(2)粒徑分析:改性陶粒,大部分粒徑集中在3-8mm,8#和9#主要集中在5-8mm; (3)強度分析:添加助劑B的五組陶粒15#-19#平均單顆強度相對更高,但單個來看,裹殼時間最長的5#裹殼陶粒的強度相對于其他組最高,達到2.47MPa,殼層最厚的9#強度達到1.99MPa; (4)抗凍性分析:9#陶粒的質(zhì)量損失率最低,21次凍融循環(huán)之后的損失率1.99%,添加助劑B,總體抗凍效果非常明顯。改性裹殼陶粒水泥試件的研究結(jié)果:(1)密度:相比于20#燒結(jié)陶粒水泥試件,所有試件密度都小于2.0g/cm3,滿足輕質(zhì)的基本要求。(2)吸水率:所有陶粒試件的吸水率小于7%。添加助劑B的組,整體吸水率較低,19#陶粒水泥試件的吸水率最低是4.38%。(3)抗凍性:3#、4#、5#水泥試件的抗凍性能良好,尤其是裹殼時間最長的5#,21次后凍融損失率僅為7.42%。殼層最厚的9#,21次后凍融損失率僅為2.04%。從15#到17#,隨著助劑B用量的增加,試件的抗凍性效果在逐漸變強。尤其17#性能最優(yōu),21次后質(zhì)量損失率僅為11.22%。底泥陶粒制備免燒磚的研究結(jié)果表明:(1)強度:裹殼陶粒磚單塊測試強度大于12Mpa,達到Mu15的標(biāo)準;防水陶粒磚單塊測試強度大于8Mpa,達到Mu10的標(biāo)準。(2)抗凍性:陶粒磚經(jīng)歷25次凍融后,質(zhì)量損失率小于5%,滿足使用。(3)整體防水陶粒和裹殼陶粒的制備工藝,可大幅度提高陶粒的強度、耐水性、抗凍融性,可作為建材基本原料。
[Abstract]:With the development of industrialization and the increase of dredging quantity in China, a large amount of dredged sediment with large area, high moisture content, complex composition and easy to produce secondary pollution is produced. Therefore, it is very important to explore a new way to utilize dredged sediment waste. This paper is devoted to exploring and researching the preparation of unburned brick from dredged sediment, which can not only effectively solve the problem of dredging sediment treatment, develop new building materials, conform to the guidance of national policy, but also save energy and waste, and protect our land resources. The application prospect is wide. At present, there is no industrial report on the use of dredged sediment to prepare sintered brick. Most of the research work is to directly mix sediment and cement into brick. A series of problems, such as low strength, poor water resistance and poor freezing and thawing resistance, are existed in the sintered bricks prepared by direct blending method, which have no practical application value. In order to solve this problem, a new process of preparing sinus-free ceramsite from dredged sediment and mixing it with cementitious material is put forward in this paper, and the compatibility between sediment and cementing material is solved. Aiming at the problems of low strength and poor freeze-thaw resistance of ceramsite in dredged sediment, the shell modification technology of ceramsite is discussed systematically, which can effectively improve the properties of ceramsite. The specific research work is as follows: the results of the study on the modification of ceramic pellets wrapped in shell are as follows: (1) when the dredged sediment is modified by unburned ceramsite, the core-bound ceramic shell can be prepared, which can greatly improve the strength of the dredged sediment without firing. The properties should meet the standard requirement of GBT17431.1-2010 "Light aggregate and its Test method".) Particle size analysis: modified ceramsite, most of which are concentrated in 3-8 mm ~ (8#) and 9# mainly in 5-8 mm; ~ (3) strength analysis: the average strength of 15 #-19 # of five groups of ceramsite added with additive B is higher than that of "15#-19#", But on a single point of view, the longest shell wrapped ceramsite had the highest strength compared to the other groups. When the shell thickness reached 2.47 MPA, the thickest shell strength reached 1.99 MPA; (4) Frost resistance analysis showed that the weight loss rate of the 20 ~ (-4)% ceramsite was the lowest after 21 freeze-thaw cycles, and the loss rate was 1.99% after 21 freeze-thaw cycles, and the total antifreeze effect was very obvious when additive B was added. Density: compared with 20 # sintered ceramsite cement specimen, the density of all samples is less than 2.0 g / cm ~ 3, which meets the basic requirement of light weight. The water absorption rate of all samples is less than 7%. In the group of additive B, the whole water absorption rate of 19 # ceramsite cement specimens was 4.38% and 4.38% respectively.) the freezing resistance of the concrete specimens was good, especially the freeze-thaw loss rate of the longest crusting time was 7.42% after 21 times. The loss rate of freezing and thawing of the thickest shell was 2.04% after 21 times. From 15# to 17#, with the increase of the dosage of additive B, the frost resistance of the specimen increased gradually. In particular, the mass loss rate of 17 # is only 11.22 after 21 times. The results of the study on the preparation of unburned brick with ceramic pellets from bottom mud show that the strength of ceramic brick with shell is more than 12Mpa. which is up to the standard of Mu15, and the test strength of waterproof ceramic brick is more than 8Mpa.which meets the standard of Mu10: the strength of ceramic brick has been frozen and thawed for 25 times. The quality loss rate is less than 5. It can be used as the basic raw material for building materials, which can greatly improve the strength, water resistance and freeze-thaw resistance of ceramsite.
【學(xué)位授予單位】：天津科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ174.76

【參考文獻】

相關(guān)期刊論文 前10條

1 惲文榮;崔健;陳玉榮;;淺談河湖疏浚淤泥資源化的研究現(xiàn)狀與展望[J];江蘇水利;2015年03期

2 宋宏秋;;霧霾背景下我國煤炭行業(yè)的轉(zhuǎn)型升級[J];商;2014年24期

3 劉銀;浩婷;張旭;劉禹楊;吳燕;;改良疏浚淤泥土對蓖麻生長的影響初探[J];南水北調(diào)與水利科技;2013年05期

4 何波;;多層地下室大體積陶�；炷潦┕ぜ夹g(shù)探討[J];科技創(chuàng)新與應(yīng)用;2013年09期

5 曹振;楊正宏;;利用鋼渣和淤泥燒制陶粒的研究[J];材料導(dǎo)報;2012年S2期

6 楊莉;梁啟斌;;滇池草海疏浚底泥脫水實驗[J];中國資源綜合利用;2012年02期

7 祁富;石慧穎;;淺談吹填淤泥地基的加固處理[J];黑龍江科技信息;2011年25期

8 曹玉鵬;吉鋒;;吹填淤泥沉積規(guī)律室內(nèi)試驗[J];水利水電科技進展;2011年03期

9 郗斐;趙大傳;;輕質(zhì)/超輕粉煤灰陶粒的研制及陶粒膨脹機理的探討和應(yīng)用[J];功能材料;2010年S3期

10 姜祖明;張玉紅;;現(xiàn)澆陶粒混凝土薄型墻體施工法[J];科學(xué)大眾(科學(xué)教育);2010年07期

相關(guān)博士學(xué)位論文 前1條

1 劉貴云;河道底泥資源化—新型陶粒濾料的研制及其應(yīng)用研究[D];東華大學(xué);2002年

相關(guān)碩士學(xué)位論文 前8條

1 劉雪麗;低碳經(jīng)濟發(fā)展評價指標(biāo)體系研究[D];南京郵電大學(xué);2013年

2 吳蘇清;超輕污泥陶粒曝氣生物濾池深度處理工業(yè)廢水的研究及應(yīng)用[D];山東大學(xué);2012年

3 閆春梅;錳尾礦燒結(jié)陶粒制備工藝研究及性能評價[D];中國地質(zhì)大學(xué)(北京);2012年

4 徐振華;污水廠污泥與河道底泥聯(lián)合高溫?zé)Y(jié)制備陶粒的技術(shù)研究[D];清華大學(xué);2012年

5 邢華橋;基于QTM的全球多分辨率水淹模擬[D];北京建筑工程學(xué)院;2012年

6 羅勝;石化行業(yè)碳排放強度估算與減排對策研究[D];中國石油大學(xué);2011年

7 姚雪燕;城市生活垃圾陶�；囼炑芯縖D];重慶大學(xué);2010年

8 張國偉;河道底泥制備陶粒的研究[D];東華大學(xué);2007年

，

本文編號：1923504