發(fā)布時(shí)間：2018-01-29 15:01

  本文關(guān)鍵詞： 自燃煤矸石骨料 配制技術(shù) 強(qiáng)度研究 Bolomey公式 尺寸效應(yīng)　出處：《遼寧工程技術(shù)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：我國(guó)是以煤炭為主要能源的國(guó)家,煤炭開采產(chǎn)生的煤矸石是目前最大宗的工業(yè)固體廢棄物,對(duì)環(huán)境造成的污染已經(jīng)引起業(yè)內(nèi)廣泛關(guān)注。因此,煤矸石減量化、資源化和規(guī)�；睦闷仍诿冀�。煤矸石的組成和性質(zhì)決定了其在建材領(lǐng)域應(yīng)用的可能性,其中以煤矸石為骨料替代天然骨料配制混凝土,是規(guī)�；{煤矸石的最佳途徑之一。本文是國(guó)家自然科學(xué)基金委員會(huì)與神華集團(tuán)有限公司聯(lián)合資助項(xiàng)目(U1261122)——“煤矸石在水泥和混凝土中資源化利用關(guān)鍵科學(xué)問(wèn)題研究”的子項(xiàng)目,所有研究成果都是在該基金的資助下取得完成的。論文首先對(duì)自燃煤矸石骨料含水狀態(tài)對(duì)混凝土拌合物工作性及抗壓強(qiáng)度的影響進(jìn)行了試驗(yàn)研究,提出了自燃煤矸石骨料單位用水量確定依據(jù),為自燃煤矸石骨料混凝土配合比設(shè)計(jì)奠定了基礎(chǔ)；接下來(lái)通過(guò)對(duì)自燃煤矸石粗骨料混凝土抗壓強(qiáng)度試驗(yàn)結(jié)果的回歸分析,建立了適合自燃煤矸石粗骨料強(qiáng)度特征的混凝土強(qiáng)度Bolomey公式；最后通過(guò)對(duì)不同尺寸的自燃煤矸石粗骨料混凝土的立方體抗壓強(qiáng)度、軸心抗壓強(qiáng)度、抗折強(qiáng)度試驗(yàn)結(jié)果統(tǒng)計(jì)分析,初步建立了各強(qiáng)度間的換算關(guān)系。主要取得以下研究成果：(1)自燃煤矸石骨料的含水狀態(tài)對(duì)混凝土拌合物和易性、硬化強(qiáng)度的影響程度遠(yuǎn)大于天然骨料,不能按普通混凝土和輕骨料混凝土配合比設(shè)計(jì)方法確定單位用水量,建議加入適當(dāng)附加水。(2)自燃煤矸石骨料混凝土拌合物坍落度,隨著自燃煤矸石骨料含水量的增大而增大,強(qiáng)度隨著自燃煤矸石骨料含水量的增大而減小。自燃煤矸石骨料加入適當(dāng)?shù)母郊铀潜ＷC混凝土拌合物和易性和硬化強(qiáng)度的關(guān)鍵,且需要提前對(duì)骨料進(jìn)行吮水潤(rùn)濕。(3)自燃煤矸石粗骨料混凝土與普通混凝土相似,抗壓強(qiáng)度與膠水比之間成近似線性關(guān)系,但由于粗骨料吸水特征和壓碎值與天然碎石區(qū)別較大,自燃煤矸石粗骨料混凝土強(qiáng)度Bolomey公式中的回歸系數(shù)與普通混凝土的不同,建立了與粗骨料壓碎值相關(guān)的回歸系數(shù)。(4)自燃煤矸石粗骨料混凝土立方體抗壓強(qiáng)度、軸心抗壓強(qiáng)度以及抗折強(qiáng)度不在遵循普通混凝土強(qiáng)度的換算系數(shù)。
[Abstract]:China is a country with coal as the main energy source. The coal gangue produced by coal mining is the largest industrial solid waste at present. The pollution to the environment has caused widespread concern in the industry. Therefore, coal gangue is reduced. The composition and properties of coal gangue determine the possibility of its application in the field of building materials, in which coal gangue is used as aggregate instead of natural aggregate to prepare concrete. It is one of the best ways to remove coal gangue on a large scale. This paper is a joint funded project U1261122 by the National Natural Science Foundation Committee and Shenhua Group Co., Ltd. -"study on the key Scientific problems of the Utilization of Coal gangue in cement and concrete". All the research results have been completed with the funding of the fund. Firstly, the effect of water content of spontaneous combustion gangue aggregate on the workability and compressive strength of concrete mixture is studied experimentally. The basis of determining the unit water consumption of coal gangue aggregate is put forward, which lays a foundation for the mix design of spontaneous combustion gangue aggregate concrete. Then through the regression analysis of the compressive strength test results of the coal gangue coarse aggregate concrete, the Bolomey formula of concrete strength suitable for the strength characteristics of the spontaneous combustion gangue coarse aggregate concrete is established. Finally, the results of cube compressive strength, axial compressive strength and flexural strength of coarse aggregate concrete of spontaneous combustion gangue with different sizes are analyzed statistically. The conversion relationship of each strength is established preliminarily. The following research results are obtained: 1) the water state of spontaneous combustion gangue aggregate has much greater influence on concrete mixing and easiness, and the influence of hardening strength is much greater than that of natural aggregate. The unit water consumption can not be determined according to the design method of mix ratio of ordinary concrete and lightweight aggregate concrete. It is suggested to add appropriate additional water. 2) slump of spontaneous combustion gangue aggregate concrete mixture. With the increase of water content of spontaneous combustion gangue aggregate. The strength decreases with the increase of water content of spontaneous combustion gangue aggregate. Adding appropriate additional water to spontaneous combustion gangue aggregate is the key to ensure concrete mixture and easiness and hardening strength. Moreover, the aggregate needs to be wetted by water sucking in advance.) the spontaneous combustion gangue coarse aggregate concrete is similar to the ordinary concrete, and the compressive strength is approximately linear with the glue ratio. However, due to the difference between coarse aggregate and natural crushed stone, the regression coefficient of strength Bolomey formula of spontaneous combustion gangue coarse aggregate concrete is different from that of ordinary concrete. The cubic compressive strength of spontaneous combustion gangue coarse aggregate concrete is established, which is related to the crushing value of coarse aggregate. The conversion coefficient of axial compressive strength and flexural strength does not follow the ordinary concrete strength.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU528

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