【文章內(nèi)容簡介】 長的再生骨料上面，RCA的使用可導(dǎo)致較高的收縮率。[ 14]這種現(xiàn)象可能歸因于FRCA的高吸收率，可通過內(nèi)部的固化過程提供水分。高吸收率骨料內(nèi)部的固化過程，被認(rèn)為有更好的干縮性。[39] 由于以前的研究表明，[40]由于高額的細(xì)顆粒,粉碎的RCAs可以用作內(nèi)部固化劑。A系列中沒有觀察到類似的趨勢，即收縮率最高的兩種混合物是A RCFA25和A RCFA75。這種相似的現(xiàn)象很可能是由于較高的收縮率，高糊劑的成分和細(xì)骨料內(nèi)部固化的組合效應(yīng)。與B系列相比，A系列中FRCA用量較少，上述的結(jié)果表明，較高的FRCA體積分?jǐn)?shù)可能會(huì)被用來提供有效的內(nèi)部固化。然而，需要進(jìn)一步的研究來證明這一假設(shè)。 新拌混凝土試驗(yàn)，流變測試和硬化混凝土試驗(yàn)結(jié)果表明，盡管各種試驗(yàn)參數(shù)并不一定相互匹配，在這項(xiàng)研究中，大多數(shù)的混合物表明SCC具有良好的性能，即符合SCC標(biāo)準(zhǔn)。有興趣的話，要注意作為替換細(xì)骨料的100％比例的FRCA所制成的混合物，這種混合物具有高坍流，低阻塞率，和高穩(wěn)定性，是非常有發(fā)展前途的新拌混凝土。這種現(xiàn)象可能會(huì)導(dǎo)致骨料填充程度較高（較低的孔隙率）和骨料級(jí)配較優(yōu)。然而，如果用這項(xiàng)研究有限的數(shù)據(jù)無法證實(shí)這個(gè)假設(shè)，就需要進(jìn)一步的調(diào)查，并結(jié)合骨料級(jí)配的影響，特別是結(jié)合骨料級(jí)配和堆積密度，來調(diào)查含F(xiàn)RCA的SCC的性能。 圖 11. 截面所選標(biāo)本 圖12. 不同百分比FRCA的SCC的28天強(qiáng)度圖 13. 不同百分比FRCA的SCC的干燥收縮曲線 . 在本文中，呈現(xiàn)了不同F(xiàn)RCA比例的SCC 混合物。在坍流，J環(huán)，V型漏斗，L盒，和VSI測試與流變測量的基礎(chǔ)上，評(píng)估了SCC新拌混凝土的性能。強(qiáng)度和干縮性能也進(jìn)行了測定。這項(xiàng)研究的結(jié)論概括如下：1. 盡管不同的測試之間，沒有相互匹配的結(jié)果，然而在這項(xiàng)研究中的大部分混合物，兩種含量為100％FRCA的混合物使混凝土具有良好的流動(dòng)性，傳遞能力，穩(wěn)定性，很好地滿足SCC標(biāo)準(zhǔn)。2. 通過坍流，J環(huán)，V型漏斗，L盒測試已經(jīng)證明了其具有良好的流動(dòng)性和傳遞能力。良好的抗離析性已被VSI測試與混凝土圓柱體的垂直橫截面的觀察證實(shí)。3. 混凝土流變測量提供了新拌混凝土的良好性能和基本信息。在這項(xiàng)研究中，SCC具有比普通混凝土更高的粘度和更低的屈服強(qiáng)度?；炷粱旌衔锏恼扯饶芘cV型漏斗和坍流測試的結(jié)果很好的相關(guān)。4. 抗壓強(qiáng)度和干燥收縮試驗(yàn)表明用FRCA制成的 SCC具有良好的性能。含F(xiàn)RCA的混凝土混合物，不僅可以提高混凝土的抗壓強(qiáng)度，同時(shí)也可以降低其干燥收縮性。5. 然而無論是在新拌混凝土和混凝土硬化階段，有望在SCC中使用FRCA，還需要進(jìn)一步的研究，來優(yōu)化組合設(shè)計(jì)，并研究FRCA在 SCC性能中的影響。參考文獻(xiàn)：[1] Okamura H, Ouchi M. Selfpacting concrete. J Adv. Concrete 。1:5–15.[2] Lauritzen EK. The global challenge for recycled concrete, International Symposium Sustainable Construction: Use of Recycled Concrete Aggregate。 1998, London, UK.[3] Khatib JM. Properties of concrete incorporating fine recycled aggregate. Cem. Concr. Res. 2005。35:763–769.[4] Zhu P, Wang X, Feng J. Research on properties of recycled fine aggregate from waste recycled aggregates concrete. Adv. Mat. Res. 2011。396–398:93–95.[5] Evangelista L, de Brito J. Mechanical behaviour of concrete made with fine recycled concrete aggregates. Cem. Concr. Compos. 2007。29:387–401.[6] Evangelista L, de Brito J. Durability performance of concrete made with fine recycled concrete aggregates. Cem. . 2010。32:9–14.[7] Yaprak H, Aruntas HY, Demir I, Simsek O, Durmus G. Effects of the fine recycled concrete aggregates on the concrete properties. Int. J. Phys. Sci. 2011。6:2455–2461.[8] Kishore R, Bairagi NK, Kumar characteristics of concrete made with recycled fine aggregate and crushed stone fines. International Conference on Solid Waste Technology and Management。 1999, Philadelphia, PA, USA.[9] Kou SC, Poon CS. Properties of concrete prepared with crushed fine stone, furnace bottom ash and fine recycled aggregate as fine aggregates. Constr. Build. 。23:2866–2877.[10] Corinaldesi V, Moriconi G. Environmentallyfriendly selfpacting concrete for rehabilitation of concrete structures, excellence in concrete construction through innovation – Proceedings of the International Conference on Concrete Construction。 2008, London, UK.[11] Kou SC, Poon CS. Properties of selfpacting concrete prepared with recycled glass aggregate. Cem. Concr. Compos. 2009。31:107–113.[12] Corinaldesi V, Moriconi G. The role of industrial byproducts in selfpacting concrete. Constr. Build. Mater. 2011。25:3181–3186.[13] Grdic ZJ, ToplicicCurcic GA, Despotovic IM, Ristic NS. Properties of selfpacting concrete prepared with coarse recycled concrete aggregate. Constr. Build. Mater. 2010。24:1129–1133.[14] Kou SC, Poon CS. Properties of selfpacting concrete prepared with coarse and fine recycled concrete aggregate. Cem. Concr. Compos. 2009。31:622–627.[15] Ridzuan ARM, Fauzi MAM, Kassim A. The evaluation of self consolidating concrete incorporating crushed concrete waste aggregate. 3rd International Symposium amp。 Exhibition in Sustainable Energy amp。 Environment (ISESEE 2011)。 2011, Malacca, Malaysia.[16] Fakitsas CG, Papakonstantinou PEA, Kiousis PD, Savva A. Effects of recycled concrete aggregates on the pressive and shear strength of highstrength selfconsolidating concrete. J. Mater. . 2012。24:356–361.[17] Yuan Y, Takao U, Yu C. SCC produced with recycled concrete aggregatess. Adv. Mater. Res. 2012。512–515:2986–2989.[18] Li J, Qu X, Chen H, Li J, Jiang L. Experimental research on mechanical performance of selfpacting reinforced concrete beam with recycled coarse aggregates. Adv. Mater. Res. 2012。374–377:1887–1890.[19] Li J, Qu X, Wang L, Zhu C, Li J. Experimental research on pressive strength of selfpacting concrete with recycled coarse aggregates. Adv. Mater. 。306–307:1084–1087, .[20] Liu Q, Cen G, Cai L, Wu Y, Wu H, Liu X. Study and application of the selfpacting recycled pavement concrete of high early strength. Appl. . 2012。193–194:910–913.[21] Reinhardt HW, W252。stholz T. About the influence of the content and position of the aggregates on the rheological behavior of selfpacting concrete. Mater. Struct. 2006。39:683–693.[22] American Society for Testing and Materials (ASTM). Annual book of ASTM standards, ASTM C150–12 standard specification for Portland cement. West Conshohocken (PA): ASTM International。2012.[23] American Society for Testing and Materials (ASTM). Annual book of ASTM standards, ASTM C61812 standard specification for coal fly ash and raw or calcined natural Pozzolan for use in concrete.West Conshohocken (PA): ASTM International。 2012.[24] American Society for Testing and Materials (ASTM). Annual book of ASTM standards, ASTM C13606 standard test method for sieve analysis of fine and coarse aggregates. West Conshohocken (PA): ASTM International。 2012.[25] American Society for Testing and Materials (ASTM). Annual book of ASTM standards, ASTM C12701 standard test method for density, relative density (specific gravity), and absorption of coarseaggregate. West Conshohocken (PA):ASTM International。 2012.[26] American Society for Testing and Materials (ASTM). Annual book of ASTM standards, ASTM C12812 standard test method for density, relative density (specific gravity), and absorption of fineaggregate. West Conshohocken (PA):ASTM International。 2012.[27] American Society for Testing and Materials (ASTM). Ann