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Abstract ：
为了研究激发剂种类对脱硫石膏-碱矿渣隧道防火涂料(DGAC)性能的影响机理,固定碱掺量为4％,碱矿渣水泥掺量为20％,探究激发剂种类,即CaO+Na2CO3、Ca(OH)2+Na2CO3、CaO+Na2SO4、Ca(OH)2+Na2SO4、NaOH,其所对应的 DGAC 分别为 CNC、CHNC、CNS、CHNS、NH,对 DGAC 干燥时间、凝结时间、干密度、抗压强度、耐水性及防火性的影响,并结合扫描电子显微镜(SEM)和X射线衍射(XRD)揭示其机理.结果表明:在干燥和凝结时间方面,CNS＞CHNS＞CNC＞CHNC＞NH;在抗压强度和耐水性方面,CHNC＞CNC＞NH＞CNS＞CHNS,CHNC生成的絮状水化硅酸钙(C-S-H)凝胶较多,其与针状钙矾石交叉紧密,具有最好的耐水性和抗压强度;在防火性方面,CHNS＞CNS＞NH＞CHNC＞CNC,CHNS和CNS中的激发剂碱性较低,其生成的C-S-H凝胶数量较少,且钙矾石的形态较粗,水化产物整体结构疏松,因此其抗压强度较低,但防火性较好.
Keyword ：
激发剂 激发剂 耐水性 耐水性 脱硫石膏-碱矿渣胶凝材料 脱硫石膏-碱矿渣胶凝材料 防火性 防火性 隧道防火涂料 隧道防火涂料
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| GB/T 7714 | 陈宗燕 , 周阳升 , 赵晓雯 et al. 脱硫石膏-碱矿渣隧道防火涂料性能及机理研究 [J]. | 涂料工业 , 2025 , 55 (2) : 7-13 . |
| MLA | 陈宗燕 et al. "脱硫石膏-碱矿渣隧道防火涂料性能及机理研究" . | 涂料工业 55 . 2 (2025) : 7-13 . |
| APA | 陈宗燕 , 周阳升 , 赵晓雯 , 季韬 , 梁咏宁 . 脱硫石膏-碱矿渣隧道防火涂料性能及机理研究 . | 涂料工业 , 2025 , 55 (2) , 7-13 . |
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The poor water resistance has long limited the widespread application of magnesium phosphate cement (MPC). This study utilized the high-alkaline of the MgO-SiO2-K2HPO4 system to activate slag and incorporated prewater-saturated pottery sand to prepare a water-resistant magnesium-based cement (SP-MSPC). The research primarily examined the effect of pottery sand on the water resistance and microstructure of SP-MSPC with different slag substitution rates. The results indicated that an increase in pottery sand content prolonged the setting time and reduced the fluidity of the paste. The incorporation of higher amounts of pottery sand decreased the mechanical properties of the matrix, but the addition of pottery sand effectively promoted paste hydration, particularly slag hydration, significantly enhancing the water resistance of the matrix. The water resistance coefficient of the S20-P6 matrix at 56 days was 72.42 %, a 61.86 % increase compared to the control group S0P0. This can be attributed to the internal curing effect of the pottery sand, which promotes paste hydration and the continuous formation of K-struvite crystals and the water-resistant M-S-H and C-(A)-S-H gels. The crystal and gel phases were bonded to each other and work synergistically with the dense filling effect of ultrafine slag particles, effectively filling the matrix pores and microcracks, blocking moisture transport channels, slowing the penetration of external moisture, and reducing the dissolution of K-struvite crystals and other hydration products aqueous environments. The incorporation of pottery sand promoted slag hydration enhanced the average polymerization degree of the C-(A)-S-H gel, and reduced the volume of macropores within the matrix.
Keyword ：
MgO-SiO 2-K 2 HPO 4 system MgO-SiO 2-K 2 HPO 4 system Microstructure Microstructure Pre-water-saturated pottery sand Pre-water-saturated pottery sand Slag Slag Water resistance Water resistance
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| GB/T 7714 | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong et al. Understanding the effect of pre-water-saturated pottery sand on the microstructure and water resistance of the slag-blended MgO-SiO2-K2HPO4 system [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 473 . |
| MLA | Yao, Pengpeng et al. "Understanding the effect of pre-water-saturated pottery sand on the microstructure and water resistance of the slag-blended MgO-SiO2-K2HPO4 system" . | CONSTRUCTION AND BUILDING MATERIALS 473 (2025) . |
| APA | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong , Ji, Tao , Liang, Yongning , Zhang, Hongru . Understanding the effect of pre-water-saturated pottery sand on the microstructure and water resistance of the slag-blended MgO-SiO2-K2HPO4 system . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 473 . |
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This study focuses on the shrinkage behavior of ultra-high performance concrete (UHPC) incorporating recycled fine aggregates (RFA). The effects of RFA content (0, 25, 50, 75, and 100 %) and different moisture states of RFA were investigated through mechanical properties, autogenous shrinkage, drying shrinkage, and restrained shrinkage. The results showed that the incorporation of RFA generally reduced the mechanical properties of UHPC, although marginal improvements were seen with the use of oven-dried or air-dried RFA. Saturated surface-dry (SSD) RFA effectively reduced autogenous shrinkage of UHPC through internal curing. However, the autogenous shrinkage in UHPC increased with the increase of RFA content. RFA also increased the drying shrinkage. Microstructural analysis revealed that the increase in the shrinkage with increasing RFA content were due to the increase in pores smaller than 50 nm, and the decrease in micromechanical properties resulting from the incorporation of RFA. In terms of restrained shrinkage, the circumferential strain, basic tensile creep, and cracking potential of UHPC were related to autogenous shrinkage. Reducing the moisture content of RFA led to an increase in autogenous shrinkage while concurrently decreasing drying shrinkage. © 2024 Elsevier Ltd
Keyword ：
Mechanical properties Mechanical properties Recycled fine aggregate Recycled fine aggregate Shrinkage Shrinkage UHPC UHPC
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| GB/T 7714 | Zhang, D. , Zhou, J. , Sun, Q. et al. Mechanical properties and early-age shrinkage of ultra-high performance concrete mortar with recycled fine aggregate [J]. | Journal of Building Engineering , 2024 , 98 . |
| MLA | Zhang, D. et al. "Mechanical properties and early-age shrinkage of ultra-high performance concrete mortar with recycled fine aggregate" . | Journal of Building Engineering 98 (2024) . |
| APA | Zhang, D. , Zhou, J. , Sun, Q. , Ji, T. , Liang, Y. , Weng, Y. et al. Mechanical properties and early-age shrinkage of ultra-high performance concrete mortar with recycled fine aggregate . | Journal of Building Engineering , 2024 , 98 . |
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The poor water resistance of traditional magnesium phosphate cement (MPC) limits its wider application in engineering fields. So far, research on enhancing the water resistance of MPC has been relatively limited. Therefore, this paper optimizes the slag content based on magnesium silicon potassium phosphate cement to prepare slag-magnesium silicon potassium phosphate cement (S-MSPPC). The research results indicate that slag contains various active components, and its appropriate addition can refine the pore structure of the paste. With the increase in slag replacement rate, the paste setting time increases, and the fluidity decreases slightly. The hydration of silica fume to produce SiO(OH)3- and SiO2(OH)22- ions significantly enhances the alkalinity of the paste and provides conditions for activating the activity of the slag. The S-MSPPC hardened paste can maintain alkalinity for the long term. Moreover, the water resistance of the S-MSPPC paste was significantly improved while ensuring mechanical properties. The water resistance coefficients of S-20 with 20 % slag increased by 49.23 % and 40.64 % at 28 days and 56 days compared to the reference group S-0. This improvement was due to the participation of silica fume and slag in the hydration reaction to form M-S-H and C-(A)-S-H gels in the paste. These gel products fill the pores and microcracks in the paste, optimize the pore size distribution, reduce porosity, and enhance density. In addition, the alkaline environment within the paste effectively slows the dissolution rate of K-struvite in water, further enhancing the water resistance of S-MSPPC. © 2024 Elsevier Ltd
Keyword ：
Bulk Density Bulk Density Pore size Pore size Silica fume Silica fume Slag cement Slag cement
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| GB/T 7714 | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong et al. Influence of slag on water resistance of magnesium silicon potassium phosphate cement [J]. | Journal of Building Engineering , 2024 , 97 . |
| MLA | Yao, Pengpeng et al. "Influence of slag on water resistance of magnesium silicon potassium phosphate cement" . | Journal of Building Engineering 97 (2024) . |
| APA | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong , Ji, Tao , Liang, Yongning . Influence of slag on water resistance of magnesium silicon potassium phosphate cement . | Journal of Building Engineering , 2024 , 97 . |
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Abstract ：
The poor water resistance of traditional magnesium phosphate cement (MPC) limits its wider application in engineering fields. So far, research on enhancing the water resistance of MPC has been relatively limited. Therefore, this paper optimizes the slag content based on magnesium silicon potassium phosphate cement to prepare slag-magnesium silicon potassium phosphate cement (S-MSPPC). The research results indicate that slag contains various active components, and its appropriate addition can refine the pore structure of the paste. With the increase in slag replacement rate, the paste setting time increases, and the fluidity decreases slightly. The hydration of silica fume to produce SiO(OH)3- and SiO2(OH)2alkalinity of the paste and provides conditions for activating the activity of the slag. The S-MSPPC hardened paste can maintain alkalinity for the long term. Moreover, the water resistance of the SMSPPC paste was significantly improved while ensuring mechanical properties. The water resistance coefficients of S-20 with 20 % slag increased by 49.23 % and 40.64 % at 28 days and 56 days compared to the reference group S-0. This improvement was due to the participation of silica fume and slag in the hydration reaction to form M-S-H and C-(A)-S-H gels in the paste. These gel products fill the pores and microcracks in the paste, optimize the pore size distribution, reduce porosity, and enhance density. In addition, the alkaline environment within the paste effectively slows the dissolution rate of K-struvite in water, further enhancing the water resistance of SMSPPC.
Keyword ：
C -(A)-S-H C -(A)-S-H cement cement Hydration characteristics Hydration characteristics Mechanical properties Mechanical properties Slag-magnesium silicon potassium phosphate Slag-magnesium silicon potassium phosphate Water resistance mechanism Water resistance mechanism
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| GB/T 7714 | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong et al. Influence of slag on water resistance of magnesium silicon potassium phosphate cement [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 . |
| MLA | Yao, Pengpeng et al. "Influence of slag on water resistance of magnesium silicon potassium phosphate cement" . | JOURNAL OF BUILDING ENGINEERING 97 (2024) . |
| APA | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong , Ji, Tao , Liang, Yongning . Influence of slag on water resistance of magnesium silicon potassium phosphate cement . | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 . |
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为了高效利用造纸工业固废白泥,以硅酸钾和碳酸钾为复合激发剂,白泥和矿渣为复合前驱体,研究不同白泥掺量对碱矿渣/白泥砂浆(ALM)干燥收缩的影响,并通过X射线衍射分析、热重-微商热重分析和压汞法解释其机理.结果表明:随着白泥掺量的增大,ALM的水化硅酸钙凝胶(C-(A-)S-H)量减少,类水滑石量保持不变,文石、球霰石和方解石量增多,凝胶孔(3.12～10 nm)和中孔(10～50 nm)减少,大孔(＞50 nm)增加,ALM吸水率增大,水分损失率增大,名义晶胶比增大,ALM的抗压强度和干燥收缩降低.白泥掺量为20.0％的ALM具有较好的28 d抗压强度和较低的干燥收缩.
Keyword ：
C-(A-)S-H凝胶 C-(A-)S-H凝胶 孔结构 孔结构 干燥收缩 干燥收缩 白泥掺量 白泥掺量 碱矿渣/白泥砂浆 碱矿渣/白泥砂浆
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| GB/T 7714 | 张典 , 陈泽林 , 梁咏宁 et al. 白泥掺量对碱矿渣/白泥砂浆干燥收缩的影响 [J]. | 南昌大学学报（工科版） , 2024 , 46 (3) : 325-331 . |
| MLA | 张典 et al. "白泥掺量对碱矿渣/白泥砂浆干燥收缩的影响" . | 南昌大学学报（工科版） 46 . 3 (2024) : 325-331 . |
| APA | 张典 , 陈泽林 , 梁咏宁 , 孙亚冬 , 李燕玲 , 季韬 . 白泥掺量对碱矿渣/白泥砂浆干燥收缩的影响 . | 南昌大学学报（工科版） , 2024 , 46 (3) , 325-331 . |
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I this work,the effects of standard curing,saturated Ca(OH)2 solution curing and autoclave curing on the corrosion of reinforcement in alkali-activated slag concrete with CaO+Na2CO3 as the exciter (CNC)were investigated under accelerated carbonation environment (CO2 concentration of 20%). The results show that compared with standard curing,saturated Ca(OH)2 solution curing does not change the hydration products of CNC but can make the early hydration of CNC more sufficient. Therefore,the average pore size decreases. Autoclaving curing converts the hydration products of CNC from C-S-H gel into hydrogarnet and 11-? type tobermorite. Therefore,the average pore size and total porosity decrease significantly. Under the same accelerated carbonization conditions,compared with standard curing,the carbonization depth of CNC decreased,the high probability corrosion time of reinforcement in CNC delayed,and the weight loss rate of reinforcement in CNC decreased both in saturated Ca(OH)2 solution curing and in autoclaving curing. Under the same curing conditions,the corrosion resistance of steel bars in CNC cured by standard curing and saturated Ca(OH)2 solution is much less than that in ordinary Portland cement concrete. The corrosion resistance of steel bars in CNC cured by autoclaving was better than that in ordinary Portland cement concrete. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
Keyword ：
alkali-activated slag concrete alkali-activated slag concrete carbonization carbonization curing regimes curing regimes electrochemical test electrochemical test pore structure pore structure steel corrosion steel corrosion weight loss rate weight loss rate
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| GB/T 7714 | Liang, Y. , Liu, W. , Zhao, K. et al. Effect of Different Curing Regimes on the Corrosion of Alkali-Activated Slag Concrete Reinforcement Under Carbonation Environment; [加速碳化条件下不同养护制度对碱矿渣混凝土钢筋锈蚀的影响] [J]. | Materials Reports , 2024 , 38 (11) . |
| MLA | Liang, Y. et al. "Effect of Different Curing Regimes on the Corrosion of Alkali-Activated Slag Concrete Reinforcement Under Carbonation Environment; [加速碳化条件下不同养护制度对碱矿渣混凝土钢筋锈蚀的影响]" . | Materials Reports 38 . 11 (2024) . |
| APA | Liang, Y. , Liu, W. , Zhao, K. , Ji, T. . Effect of Different Curing Regimes on the Corrosion of Alkali-Activated Slag Concrete Reinforcement Under Carbonation Environment; [加速碳化条件下不同养护制度对碱矿渣混凝土钢筋锈蚀的影响] . | Materials Reports , 2024 , 38 (11) . |
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研究了加速碳化环境(CO_2浓度为20%)下，标准养护、饱和Ca(OH)_2溶液养护和蒸压养护对CaO+Na_2CO_3为激发剂的碱矿渣混凝土(CNC)中钢筋锈蚀的影响。结果表明，与标准养护相比，饱和Ca(OH)_2溶液养护不改变CNC的水化产物，但使其早期水化更加充分，因此平均孔径减小；蒸压养护使CNC水化产物由C-S-H凝胶转化为水榴石与11-?型的托勃莫来石，平均孔径和总孔隙率显著减小。在相同的加速碳化龄期下，与标准养护相比，饱和Ca(OH)_2溶液养护和蒸压养护的CNC碳化深度降低、CNC中钢筋发生高概率锈蚀时间延缓、钢筋失重率下降。与相同养护条件下的普通硅酸盐混凝土相比，标准养护和饱和Ca(OH)_2溶液养护的CNC中钢筋抗锈蚀能力远小于普通硅酸盐混凝土，而蒸压养护的CNC中钢筋抗锈蚀能力大于普通硅酸盐混凝土。
Keyword ：
养护制度 养护制度 失重率 失重率 孔结构 孔结构 电化学测试 电化学测试 碱矿渣混凝土 碱矿渣混凝土 碳化 碳化 钢筋锈蚀 钢筋锈蚀
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| GB/T 7714 | 梁咏宁 , 刘务东 , 赵凯 et al. 加速碳化条件下不同养护制度对碱矿渣混凝土钢筋锈蚀的影响 [J]. | 材料导报 , 2024 , 38 (11) : 162-169 . |
| MLA | 梁咏宁 et al. "加速碳化条件下不同养护制度对碱矿渣混凝土钢筋锈蚀的影响" . | 材料导报 38 . 11 (2024) : 162-169 . |
| APA | 梁咏宁 , 刘务东 , 赵凯 , 季韬 . 加速碳化条件下不同养护制度对碱矿渣混凝土钢筋锈蚀的影响 . | 材料导报 , 2024 , 38 (11) , 162-169 . |
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为探究生活垃圾焚烧炉渣(MSWI-BA)对碱矿渣净浆耐高温性能的影响机理，将6%的矿渣等质量替换为MSWI-BA,制备碱矿渣水泥净浆(AASBp),研究不同温度对AASBp的质量损失率、干燥收缩率和强度的影响.以普通硅酸盐水泥净浆作为对照组，结合多种微观手段，揭示AASBp的耐高温机理，并与未掺MSWI-BA的碱矿渣水泥(AASp)进行对比.结果表明：随着温度的升高，AASBp中水化硅铝酸钙的钙硅比(C/S)先降低后升高；在400℃时，水化硅铝酸钙的聚合度最高，C/S最低；Al—O键在600℃断裂，而Si—O键在1 000℃断裂；MSWI-BA可提高基体孔隙的连通性，高温处理后孔隙压力得到释放，因此AASBp比AASp具有更高的归一化抗压强度和耐高温性能.
Keyword ：
干燥收缩率 干燥收缩率 水化硅铝酸钙的聚合度 水化硅铝酸钙的聚合度 生活垃圾焚烧炉渣 生活垃圾焚烧炉渣 碱激发矿渣 碱激发矿渣 耐高温 耐高温
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| GB/T 7714 | 张彬彬 , 马宇 , 梁咏宁 et al. 含生活垃圾焚烧炉渣的碱矿渣水泥耐高温机理 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (03) : 299-306 . |
| MLA | 张彬彬 et al. "含生活垃圾焚烧炉渣的碱矿渣水泥耐高温机理" . | 福州大学学报(自然科学版) 52 . 03 (2024) : 299-306 . |
| APA | 张彬彬 , 马宇 , 梁咏宁 , 林毅武 , 季韬 . 含生活垃圾焚烧炉渣的碱矿渣水泥耐高温机理 . | 福州大学学报(自然科学版) , 2024 , 52 (03) , 299-306 . |
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环境中微生物的化学和代谢活动会造成混凝土结构的劣化。在生物硫酸(T.f细菌,pH=1.1)下,本文探究水泥类型和阻锈剂对人工鱼礁混凝土(ARC)钢筋处孔隙液pH值、腐蚀电位、腐蚀电流及锈蚀率的影响,结合孔结构、SEM-EDS、XRD和IR揭示其机理。结果表明:与采用普通硅酸盐水泥的ARC相比,使用硫铝酸盐水泥(SAC)的ARC,其孔隙充满更多的AFt,孔结构更加致密,经生物硫酸腐蚀后,完全疏松区和部分疏松区的石膏衍射峰强度较低,这对未完全溶解水化产物的撕拉作用较小,且在部分疏松区仍存在Ca-O键,抗生物硫酸腐蚀能力更强;采用SAC和阻锈剂,ARC钢筋处孔隙液pH值减小速率最低,且腐蚀84 d后,腐蚀电位最高,腐蚀电流和锈蚀率最低,具有最好的耐生物硫酸腐蚀性能。
Keyword ：
人工鱼礁混凝土 人工鱼礁混凝土 生物硫酸 生物硫酸 硫铝酸盐水泥 硫铝酸盐水泥 钢筋锈蚀 钢筋锈蚀 阻锈剂 阻锈剂
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| GB/T 7714 | 周阳升 , 陈彩艺 , 梁咏宁 et al. 人工鱼礁混凝土抗生物硫酸腐蚀机理 [C] //第十届海洋材料与腐蚀防护大会暨第四届钢筋混凝土耐久性与设施服役安全大会 . 2024 . |
| MLA | 周阳升 et al. "人工鱼礁混凝土抗生物硫酸腐蚀机理" 第十届海洋材料与腐蚀防护大会暨第四届钢筋混凝土耐久性与设施服役安全大会 . (2024) . |
| APA | 周阳升 , 陈彩艺 , 梁咏宁 , 季韬 . 人工鱼礁混凝土抗生物硫酸腐蚀机理 第十届海洋材料与腐蚀防护大会暨第四届钢筋混凝土耐久性与设施服役安全大会 . (2024) . |
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