【正文】 1?C for the remaining ages. At the age of 3, 28 and 90 days, their pressive strengths were tested according to Chinese National Standards GB/T176711999.2. Results and discussion. Characteristics of the mineral positions of steel slagFig. 1 shows the particle size distributions of steel slag and cement. The steel slag contains % (volume fraction) particles with diameters smaller than 10 m and % particles with diameters larger than 60 m. The cement contains % and % of particles with diameters smaller than 10 m and larger than 60 m, respectively. Steel slag has a little higher proportion of small particles (10 m) and much higher proportion of large particles (60 m) than Portland cement, however, the proportion of moderate particles (10–60 m) in steel slag is far less than that in Portland cement, so steel slag indicates a relative poor continuity in particle size distribution. The poor continuity is also reflected in Fig. 2, a morphological micrograph of steel slag grains at 1000amplification.In XRD spectrum of steel slag, characteristic peaks of mineral phases concentrate at 30–45? [1,16–18]. Fig. 3 pares the XRD spectrums of the original steel slag, steel slagA, and steel slagB. It is derived from Fig. 3 that steel slagB is lower at C3S, C2S, C2Al2Si3O12 and C12A7 but richer at RO phase than the original steel slag. Steel slagA is richer at C3S, C2S, C2Al2Si3O12 and C12A7 but lower at RO phase than the original steel slag. Fig. 4 and Table 2 show the morphology and EDX results of the small particles in the steel slag, respectively. It is derived from EDX that these small particles are posed mainly by silicate and aluminate, and besides, a small amount of RO phase and Fe3O4.abFig. 4. SEM morphologies of small steel slag particles.. Contribution of mineral to cementitious performance of steel slag The results of Ref. [16] showed that most silicate and aluminate in steel slag have hydrated after 90 days of reaction, producing C–S–H gel, C–S–Al–H gel and Ca(OH)2。1 ?C to testing ages. At the ages of 1, 3, 7, 28, 90, and 360 days, the samples were placed in acetone. The absorption of the acetone into the pores of paste can stop the hydration process by eliminating the remaining water. After removing the free water, the samples were dried in vacuum at room temperature. The morphologies of steel slag and its hydration products were characterized using a FEI Quanta200F scanning electron microscope under a high vacuum condition (SEM). EDX was used to identify the element distributions of the mineral phases and hydration products. The steel slag and its hydration products were mineralogically determined by Xray diffraction. XRD measurements were conducted with a TTR III diffractometer using nickelfiltered Cu K 1 radiation (=? ), 50 kV voltage and 200mA current. The nonevaporable water content of paste was obtained as the difference in mass between the sample heated at 65 ?C and 1000 ?C normalized by the mass after heating 65 ?C, and correcting for the loss on ignition of unhydrated samples. Thermogravimetric analysis (TGDTG) was carried out using a Setaram thermoanalyser at a heating rate of 10 ?C/min up to 900 ?C. Apart from the original steel slag, two other kinds of steel slag were obtained by sieving the original steel slag into two portions. Steel slagA represented the portion of particles smaller than 61 m, which accounts for 81% of the total mass of the original steel slag. Steel slagB represented the other portion. Mortar bars of 40mm40mm160mm were prepared. The watertobinder ratio of all mortars was . The sandtobinder ratio of all mortars was . Mortars made by binders posed of 100% cement, 80% cement and 20% original steel slag, 80% cement and 20% fly ash, 80% cement and 20% steel slagA, 60% cement and 40% original steel slag, 60% cement and 40% fly ash, and 60% cement and 40% steel slagA were denoted by CM, SM1, FM1, SSM1, SM2, FM2, SSM2, respectively. Mortars were cured first at 20177。 參考文獻 [1]黃西平,張琦等. 有色冶金節(jié)能,2022（5）:68.[3]朱祖武,[J].南昌高專學(xué)報,2022（2）:9294. [4]許并杜,[M]. 化學(xué)工業(yè)出版社 ,2022.[5][J].邯鄲職業(yè)技術(shù)學(xué)院學(xué)報 ,2022(1).[6]詹學(xué)斌,[J].水泥,1997(6):89.[7]鄧軍平,陳新年, [J].西安科技大學(xué)學(xué)報,20224(28):735739.[8 [J].山西建筑,2022,17(29):4849.[9]李經(jīng)寬,喬曉磊, [M].太原理工大學(xué)學(xué)報,20226(39):573575.[10]南峰,伍永華,[J].混凝土世 界,2022(13):5254.[11][P]. 中國專利:101428187A,20220513.[12]張習(xí)賢,[J]. 中南公路工程 ,1997,2(22):3540. [13]崔永成,崔自治,、粉煤灰復(fù)合改善瀝青粘結(jié)性研究 [J].粉煤灰綜合利用,2022(5):1113. [14]章啟軍,劉育鑫, [M].再生資源與循環(huán)經(jīng)濟,2022(6):3032. [15]肖力光,王思宇, [J].吉林建筑　工程學(xué)院學(xué)報,2022(1):17.[16][M]. 中南大學(xué)出版社,2022.[17][M]. 輕金屬,1993（3):3740.[18][J]. 河南省冶金規(guī)劃設(shè)計院 ,4344.[19] 型微區(qū)能量色散型 X 射線熒光光譜分析儀[M].現(xiàn)代儀器,2022(5):4042.附錄 外語文獻譯文英文原文A discussion on improving hydration activity of steel slag by altering its mineral positionsAbstract This study aims to investigate the ways to improve the cementitious properties of steel slag. The results show that the cementitious phase of steel slag is posed of silicate and aluminate, but the large particles of these phases make a very small contribution to the cementitious properties of steel slag. RO phase (CaO–FeO–MnO–MgO solid solution), Fe3O4, C2F and fCaO make no contribution to the cementitious properties of steel slag. A new kind of steel slag with more cementitious phase and less RO phase can be obtained by removing some large particles. This new steel slag possesses better cementitious properties than the original steel slag. The large particles can be used as fine aggregates for concrete. Adding regulating agent high in CaO and SiO2 during manufacturing process of steel slag to increase the cementitious phase to inert phase ratio is another way to improve its cementitious properties. The regulating agent should be selected to adapt to the specific steel slag and the alk