本文選題：MA混合料　切入點(diǎn)：模擬設(shè)備　出處：《華南理工大學(xué)》2014年博士論文

【摘要】：鋼橋面鋪裝層受復(fù)雜多變的自然環(huán)境影響以及繁重的交通負(fù)荷作用，工作條件十分復(fù)雜，一直受到國(guó)內(nèi)外學(xué)術(shù)界與工程界的高度重視與關(guān)注�，F(xiàn)階段，國(guó)內(nèi)外鋼橋面鋪裝方案主要有雙層SMA類(lèi)、澆注式類(lèi)（分Mastic Asphalt及GussAsphalt二種，分別簡(jiǎn)稱(chēng)MA、GA）、環(huán)氧類(lèi)和ERS類(lèi)。與其他鋪裝方案相比，MA（Mastic Asphalt）具有密水、耐老化、抗疲勞和隨從變形能力好等優(yōu)點(diǎn)，其生產(chǎn)工藝是將原材料在Cooker車(chē)連續(xù)拌和，拌和時(shí)間較長(zhǎng)（4～6小時(shí)），施工效率較低，不能很好滿(mǎn)足項(xiàng)目工程量大、施工期緊的要求。而GA（Guss Asphalt）采用瀝青拌和樓對(duì)所有原材料進(jìn)行集中拌和生產(chǎn)，連續(xù)施工，施工效率較高，但GA混合料的穩(wěn)定性略遜于MA混合料。 因此，為了充分發(fā)揮MA混合料的性能穩(wěn)定優(yōu)勢(shì)和GA工藝的工效優(yōu)勢(shì)，本文提出利用瀝青拌和樓拌和MA混合料的方法有助于解決上述問(wèn)題。但作為一種全新的工藝，其中可能存在的問(wèn)題包括：（1）目前試驗(yàn)室內(nèi)采用的常規(guī)瀝青混合料拌和設(shè)備不能滿(mǎn)足要求，有必要研制室內(nèi)小型相似拌和設(shè)備。（2）為了確保利用模擬設(shè)備生產(chǎn)MA混合料具有優(yōu)良的使用性能，確定合理的拌和工藝參數(shù)，，發(fā)揮各自?xún)?yōu)勢(shì)有必要進(jìn)行研究。（3）利用模擬設(shè)備生產(chǎn)MA的混合料的實(shí)際性能路用如何，有必要采用加速加載試驗(yàn)，驗(yàn)證利用足尺設(shè)備生產(chǎn)的MA、與利用模擬設(shè)備生產(chǎn)MA混合料的性能進(jìn)行對(duì)比。 基于此，本文開(kāi)展了MA混合料的試驗(yàn)設(shè)備研制與利用模擬設(shè)備生產(chǎn)MA混合料的應(yīng)用研究，為該工藝的推廣以及全面運(yùn)用于實(shí)體工程生產(chǎn)提供理論依據(jù)和技術(shù)支持。本文開(kāi)展的主要研究工作及所得結(jié)論如下： （1）提出了既能充分發(fā)揮MA級(jí)配的性能穩(wěn)定優(yōu)勢(shì)，又能發(fā)揮GA工藝的工效優(yōu)勢(shì)的瀝青拌和樓拌和MA工藝，介紹了本文擬用的MA混合料評(píng)價(jià)方法與技術(shù)指標(biāo)，用試驗(yàn)結(jié)果說(shuō)明研制室內(nèi)試驗(yàn)設(shè)備的必要性。。 （2）針對(duì)目前室內(nèi)攪拌設(shè)備無(wú)法準(zhǔn)確模擬拌和MA混合料的工況，MA混合料的室內(nèi)試驗(yàn)研究結(jié)果有很多局限性，為滿(mǎn)足MA混合料的試驗(yàn)要求，設(shè)計(jì)并試制了MA混合料室內(nèi)小型攪拌設(shè)備。葉片安裝角為30°時(shí)，混合料的宏觀和微觀均勻度最好；拌缸溫度控制在220°時(shí)攪拌效果更優(yōu)于其他溫度；長(zhǎng)寬比小于1的寬短形攪拌缸比長(zhǎng)寬比大于1的窄長(zhǎng)形攪拌缸攪拌效果更好。 （3）Cooker拌和工藝對(duì)澆注式混凝土的性能影響很大。而目標(biāo)配合比設(shè)計(jì)以及大量的室內(nèi)研究單次需要混合料的數(shù)量很少，如采用常規(guī)Cooker運(yùn)輸車(chē)來(lái)生產(chǎn)將造成極大的浪費(fèi)。通過(guò)對(duì)常規(guī)保溫?cái)嚢柽\(yùn)輸車(chē)Cooker的結(jié)構(gòu)、機(jī)理進(jìn)行分析，通過(guò)相似理論設(shè)計(jì)方法，研制出室內(nèi)模擬Cooker設(shè)備供試驗(yàn)室進(jìn)行MA混合料室內(nèi)試驗(yàn)使用。 （4）利用小型攪拌設(shè)備與模擬Cooker組合對(duì)MA混合料進(jìn)行了室內(nèi)試驗(yàn)研究，重點(diǎn)研究拌和工藝對(duì)MA混合料性能的影響，從MA混合料的觸變特性、老化性和工作性方面考慮，適宜的拌和參數(shù)為拌和溫度220℃，拌和時(shí)間1.5小時(shí)，轉(zhuǎn)速為7轉(zhuǎn)/min。 （5）采用加速加載試驗(yàn)對(duì)利用兩種生產(chǎn)方式生產(chǎn)的MA混合料的高溫性能和疲勞性能進(jìn)行比較研究，結(jié)果表明：采用不同生產(chǎn)方式生產(chǎn)的MA混合料的實(shí)際路用性能接近。
[Abstract]:The steel bridge deck pavement layer by the complex natural environment and traffic load is heavy, working conditions are very complex, and has received great attention and concern of domestic and foreign academia and engineering. At present, domestic and foreign steel deck pavement scheme of double major class SMA, class Mastic pouring type (Asphalt and GussAsphalt two which were referred to as MA, GA), epoxy and ERS. Compared with other solution, MA (Mastic Asphalt) has the advantages of dense water, anti-aging, anti fatigue and attendant deformation ability is good, the production process is the continuous mixing of raw materials in the Cooker car, mixing time (4~6 hours). The construction efficiency is low, can not meet the project is large, the construction period tight requirements. GA (Guss Asphalt) using asphalt mixing plant for centralized mixing production, all the raw materials of continuous construction, the construction efficiency is high, but the stability of GA mixture Very close to MA mixture.
Therefore, in order to stable performance advantages and GA technology and give full play to the advantages of MA mixture efficiency, this paper proposes to use the method of asphalt mixing plant mixing MA mixture to help solve these problems. But as a new technology, the possible problems include: (1) using the conventional indoor test of asphalt mixing equipment can not meet the requirements, it is necessary to develop indoor small similar mixing equipment. (2) in order to ensure that the material with excellent performance by simulation equipment for the production of MA mixture, mixing to determine reasonable process parameters, their advantage is necessary to carry out research. (3) the actual mixture road performance using simulation equipment how to use MA, it is necessary to adopt the accelerated loading test, verified by full-scale production equipment MA, compared with the performance using simulation equipment for the production of MA mixture.
Based on this, this paper carried out the simulation of equipment manufacture and application of MA mixture design test equipment of MA mixture and utilization, provide theoretical basis and technical support for the promotion of this process and fully applied to real engineering production. This paper carried out the following main research work and conclusions:
(1) proposed can give full play to the performance advantages of MA stable gradation, asphalt mixing plant mixing process of MA can play GA process efficiency advantage, this paper introduces the proposed MA mixture evaluation methods and technical indexes, the necessity of development of laboratory test equipment. Experiment results show that the
(2) aiming at the interior mixing equipment can not accurately simulate the mixing of MA mixture conditions, laboratory tests on MA mixture results have many limitations, to meet the test requirements of MA mixture, designed and manufactured a MA mixture of small indoor mixing equipment. The blade installation angle is 30 degrees, the macro and micro mixing the best material uniformity; mixing cylinder temperature control in 220 degrees when the stirring effect is better than other temperature; the ratio of length to width wide short form less than 1 of the mixing cylinder than the length width ratio is greater than 1 of the narrow and long mixing tank mixing effect is better.
(3) Cooker greatly influences the mixing process on the performance of pouring concrete. And the target is less than the number with a large number of indoor study design and single to mixed material, such as the use of conventional Cooker vehicle production will cause great waste. By mixing structure transport vehicle Cooker of conventional insulation mechanism were analyzed, through the design method of similarity theory, developed the indoor analog Cooker equipment MA using mixture laboratory test for test chamber.
(4) the use of small mixing equipment and Simulation of Cooker combination of MA mixture were studied, focusing on the influence of mixing process on the properties of MA mixture, from the thixotropic properties of MA mixture, aspects of aging and work, mixing appropriate parameters of the degree of 220 DEG C for Ban Hewen, the mixing time of 1.5 hours. Speed of 7 rpm /min.
(5) accelerated loading test was used to compare the high temperature performance and fatigue performance of MA mixture produced by two production methods. The results showed that the actual road performance of MA mixture produced by different production methods was close.

【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U415.52

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