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学者姓名：林旭健
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Abstract ：
硅磷酸钾镁水泥(MSPPC)是一种新型高性能磷酸镁水泥,与使用酸性磷酸二氢钾制成的普通磷酸钾镁水泥(MKPC)不同,其必要原材料包括碱性磷酸氢二钾、氧化镁和硅灰.MKPC不掺缓凝剂难以制备,而MSPPC由于凝结时间较长,无需使用缓凝剂即可制备,硬化后具有比MKPC更优异的力学性能,但其工作性能尚未能很好满足实际工程应用需求,可通过缓凝剂用量来调节凝结时间和流动性.硼砂是磷酸镁水泥常用的缓凝剂,但其具有潜在的毒性迫使人们需要寻找一种安全有效的替代品.本工作研究了葡萄糖酸钠(SG)掺量对MSPPC工作性能、抗压强度、水化温度、pH值、物相组成、孔隙率和微观形貌的影响,并建立了缓凝机理模型.结果表明,SG掺量越高,缓凝效果越显著,当SG掺量为6％时,初凝时间由12 min延长至30 min;净浆流动度由84 mm提升至142 mm;大于0.1 μm的孔占比减少,有效改善了孔径分布;水化产物的种类未发生改变,但3 d的抗压强度由64.3 MPa下降到53.9 MPa,下降了 16.2％,而56 d的抗压强度下降了 6.99％,不利影响减小.
Keyword ：
凝结时间 凝结时间 孔隙率 孔隙率 物相组成 物相组成 硅磷酸钾镁水泥 硅磷酸钾镁水泥 葡萄糖酸钠 葡萄糖酸钠
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| GB/T 7714 | 杨一哲 , 林旭健 , 许晓莹 et al. 葡萄糖酸钠对硅磷酸钾镁水泥基本性能的影响 [J]. | 材料导报 , 2024 , 38 (17) : 80-85 . |
| MLA | 杨一哲 et al. "葡萄糖酸钠对硅磷酸钾镁水泥基本性能的影响" . | 材料导报 38 . 17 (2024) : 80-85 . |
| APA | 杨一哲 , 林旭健 , 许晓莹 , 林恒舟 , 陈韦羽 , 叶财发 . 葡萄糖酸钠对硅磷酸钾镁水泥基本性能的影响 . | 材料导报 , 2024 , 38 (17) , 80-85 . |
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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)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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Silica fume (SF) is commonly used in producing magnesium potassium phosphate cement (MPC) and magnesium silicate hydrate cement (MSHC). However, its roles in magnesium cement would differ from each other when mono hydrogen phosphate was involved. This paper aims to find optimized compositions in MgO-K2HPO4 DKP- SF system with comprehensive considerations of the micro and macro performances. Ternary contour maps were designed to determine the optimized proportions of MgO, DKP and SF. The hydration reaction mechanism was analyzed with a variety of techniques including XRD, SEM, TG-DTG and NMR. Magnesium cement containing 60–75 % dead-burnt MgO, 10–25 % DKP and 12.5–25 % SF exhibited excellent compressive strength and volume stability. K-struvite and M-S-H were confirmed to promote the hydration and hardening performance of the blended MgO-DKP-SF system with optimized proportions. An excess of soluble K+ from DKP may precipitate as KOH and then dissolute in solution, increasing pH and release of Si from SF. © 2024 Elsevier Ltd
Keyword ：
Hydration Hydration Magnesium potassium phosphate cement Magnesium potassium phosphate cement Magnesium silicate hydrate cement Magnesium silicate hydrate cement MgO-K2HPO4-SiO2 system MgO-K2HPO4-SiO2 system Microstructure Microstructure
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| GB/T 7714 | Sun, H. , Sun, X. , Kang, S. et al. New magnesium cement optimized in MgO-K2HPO4-SiO2 system and its hardening performance [J]. | Construction and Building Materials , 2024 , 446 . |
| MLA | Sun, H. et al. "New magnesium cement optimized in MgO-K2HPO4-SiO2 system and its hardening performance" . | Construction and Building Materials 446 (2024) . |
| APA | Sun, H. , Sun, X. , Kang, S. , Lin, X. , Qian, J. , Wu, W. . New magnesium cement optimized in MgO-K2HPO4-SiO2 system and its hardening performance . | Construction and Building Materials , 2024 , 446 . |
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The fire-retardant lightweight mortar spalling from the tunnel lining substrates can threaten the safety of vehicles. The use of steel slag (SS) in alkali-activated cement can reduce the carbon emission and cost of lightweight mortar. The effects of SS on the bond strength and the microstructure of the interface between alkali-activated SS/fly ash (FA) lightweight mortar (ASFm) and concrete substrates was studied. The SS contents, namely, the mass ratio of SS to the summation of FA and SS, were 0 %, 20 %, 40 %, 60 %, and 80 %. The properties of ASFm, including compressive strength, fire resistance and bond strength, were studied. Results demonstrated that the bond strength of ASFm increases and then decreases with the increase in SS content. The highest bond strength of 0.65 MPa was obtained at 40 % SS content. Bond strength was determined by the pore structure and micromechanical properties of the matrix. When the SS content was increased from 0 % to 40 %, the content of C-A-S-H gel and C-N-A-S-H gel contents increased, and the porosity was reduced; hence, the bond strength of ASFm became larger. When the SS content increased from 40 % to 80 %, SS acted as an inhibitor, which reduced the micromechanical properties and increased the porosity of ASFm; therefore, the bond strength of ASFm decreased. This achievement provides an alternative way for the application of SS in tunnels. © 2024 Elsevier Ltd
Keyword ：
Aluminum coated steel Aluminum coated steel Bond strength (materials) Bond strength (materials) Compressive strength Compressive strength Light weight concrete Light weight concrete Mortar Mortar Slag cement Slag cement Tunnel linings Tunnel linings
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| GB/T 7714 | Ma, Yu , Zhang, Cuirong , Lin, Xujian et al. Bond between alkali-activated steel slag/fly ash lightweight mortar and concrete substrates: Strength and microscopic interactions [J]. | Construction and Building Materials , 2024 , 449 . |
| MLA | Ma, Yu et al. "Bond between alkali-activated steel slag/fly ash lightweight mortar and concrete substrates: Strength and microscopic interactions" . | Construction and Building Materials 449 (2024) . |
| APA | Ma, Yu , Zhang, Cuirong , Lin, Xujian , Ye, Yongbin , Ye, Xiaoqing , Ji, Tao . Bond between alkali-activated steel slag/fly ash lightweight mortar and concrete substrates: Strength and microscopic interactions . | Construction and Building Materials , 2024 , 449 . |
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通过对原料轻烧氧化镁粉在不同温度下进行二次恒温煅烧1.5 h制备不同活性MgO,研究了不同活性MgO与硅灰(SF)和磷酸氢二钾(K2 HPO4)所制备的新型水化硅酸镁水泥胶凝材料(又称水化磷硅酸镁水泥,MSPHC)的凝结时间、流动度、抗压强度、反应溶液pH值.结合X射线衍射(XRD)、热重分析(TG-DTG)和扫描电子显微镜(SEM)测试手段,分析其影响机理.结果表明:随着煅烧温度的升高,MgO衍射峰强度增大,MgO活性降低;活性越高的MgO制备的MSPHC净浆凝结时间越短且流动性越差,而活性适中MgO制备的MSPHC具有较好的力学性能.MSPHC最主要的水化产物是水化硅酸镁(M-S-H)凝胶,另外还有Mg(OH)2和MgKPO4·6H2O(MKP)生成,原料轻烧氧化镁粉中的MgCO3成分不参与体系反应.活性适中的MgO制备的MSPHC在28 d龄期内的水化产物M-S-H凝胶生成量最多,因此硬化体抗压强度最高.活性越高的MgO在MSPHC反应体系中溶解的速度越快,体系水化反应进程速度也越快.
Keyword ：
MgO活性 MgO活性 力学性能 力学性能 水化产物 水化产物 水化硅酸镁(M-S-H) 水化硅酸镁(M-S-H) 磷酸氢二钾(K2HPO4) 磷酸氢二钾(K2HPO4)
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| GB/T 7714 | 周凌峰 , 林旭健 , 王威 . MgO活性对新型水化硅酸镁水泥性能的影响 [J]. | 硅酸盐通报 , 2023 , 42 (1) : 57-65 . |
| MLA | 周凌峰 et al. "MgO活性对新型水化硅酸镁水泥性能的影响" . | 硅酸盐通报 42 . 1 (2023) : 57-65 . |
| APA | 周凌峰 , 林旭健 , 王威 . MgO活性对新型水化硅酸镁水泥性能的影响 . | 硅酸盐通报 , 2023 , 42 (1) , 57-65 . |
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In order to efficiently utilize steel slag and reduce carbon emissions, the performance of alkali -activated slag/stainless steel slag mortar (ASM) prepared with a composite activator is investi-gated. In this work, CaO, Na2CO3 and water glass (WG) are used as composite activators, where the alkali equivalents of CaO and Na2CO3 are maintained at 4% and the alkali equivalents of WG (i.e. WG content) as variables were 0, 0.5%, 1.0%, 1.5% and 2.0% respectively. The properties of ASM, including mechanical properties, autogenous and drying shrinkage, are investigated. Re-sults show that the mechanical properties of ASM decrease and then increase as the WG content increases, with the worst mechanical properties of ASM occurring when the WG content is 0.5%. The autogenous shrinkage of ASM decreases as the WG content increases from 0 to 0.5% followed by an increase as the WG content increases further to 2.0%. Autogenous shrinkage depends on chemical shrinkage, small pore (<50 nm) volume, MCL and capillary pressure. When the WG content is increased from 0 to 0.5%, the hydration reaction is inhibited by the reaction of the WG and CaO which reduces the pH of activator solution and gel amount, leading to a reduction in chemical shrinkage, small pore volume, MCL and capillary pressure. However, the high WG content accelerates the hydration reaction when the WG content is greater than 0.5%, which increases the autogenous shrinkage. The drying shrinkage of ASM decreases and subsequently increases as the WG content increases. The higher drying shrinkage is associated with weight loss due to the excellent connectivity of the pores. The pore structure also affects the drying shrinkage, which can be justified on the basis of capillary pressure.
Keyword ：
Alkali -activated slag Alkali -activated slag Autogenous shrinkage Autogenous shrinkage Composite activators Composite activators Drying shrinkage Drying shrinkage stainless steel slag stainless steel slag Stainless steel slag Stainless steel slag
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| GB/T 7714 | Ma, Yu , Zhang, Binbin , Wang, Benjun et al. Fluidity, mechanical properties, shrinkage of alkali-activated slag/ stainless steel slag mortars with composite activators [J]. | JOURNAL OF BUILDING ENGINEERING , 2023 , 75 . |
| MLA | Ma, Yu et al. "Fluidity, mechanical properties, shrinkage of alkali-activated slag/ stainless steel slag mortars with composite activators" . | JOURNAL OF BUILDING ENGINEERING 75 (2023) . |
| APA | Ma, Yu , Zhang, Binbin , Wang, Benjun , Lin, Xujian , Zhu, Jianqin , Huang, Ping et al. Fluidity, mechanical properties, shrinkage of alkali-activated slag/ stainless steel slag mortars with composite activators . | JOURNAL OF BUILDING ENGINEERING , 2023 , 75 . |
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In this paper, the MgO with different reactivity was prepared by the secondary constant temperature calcination of the raw material light burned magnesium oxide powder for 1. 5 h at different temperatures. The setting time, fluidity, compressive strength and reaction solution pH value of a new type of magnesium silicate hydrate cement cementitious materials (also known as magnesium silicate phosphate hydrate cement, MSPHC) prepared with different reactivity MgO, silica fume (SF) and dipotassium hydrogen phosphate (K2HPO4) were investigated. The mechanism was analyzed through X-ray diffraction (XRD), thermogravimetric analysis (TG-DTG) and scanning electron microscopy (SEM). The results show that with the increase of calcination temperature, the intensity of MgO diffraction peak increases and the reactivity decreases. The faster the setting time and poorer the fluidity of the MSPHC purified slurry prepared by MgO with higher reactivity, while the MSPHC prepared with moderate reactivity MgO can achieve better mechanical properties. The most important hydration product of MSPHC is magnesium silicate hydrate (M-S-H) gel, besides, Mg(OH)2 and MgKPO4·6H2O (MKP) are also generated. The MgCO3 component in the raw material light burned magnesium oxide powder does not participate in the system reaction. MSPHC prepared by MgO with moderate activity has the highest hydration product M-S-H gel generation within 28 d of age, so the hardened body has the highest compressive strength. The higher the reactivity of MgO in the MSPHC reaction system is, the faster the dissolution rate is, the faster the hydration reaction process is. © 2023 Bulletin of the Chinese Ceramic Society Press.
Keyword ：
dipotassium hydrogen phosphate (K2HPO4) dipotassium hydrogen phosphate (K2HPO4) hydration product hydration product magnesium silicate hydrate (M-S-H) magnesium silicate hydrate (M-S-H) mechanical property mechanical property MgO reactivity MgO reactivity
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| GB/T 7714 | Zhou, L. , Lin, X. , Wang, W. . Effect of MgO Reactivity on Properties of New Magnesium Silicate Hydrate Cement; [MgO 活性对新型水化硅酸镁水泥性能的影响] [J]. | Bulletin of the Chinese Ceramic Society , 2023 , 42 (1) : 57-65 . |
| MLA | Zhou, L. et al. "Effect of MgO Reactivity on Properties of New Magnesium Silicate Hydrate Cement; [MgO 活性对新型水化硅酸镁水泥性能的影响]" . | Bulletin of the Chinese Ceramic Society 42 . 1 (2023) : 57-65 . |
| APA | Zhou, L. , Lin, X. , Wang, W. . Effect of MgO Reactivity on Properties of New Magnesium Silicate Hydrate Cement; [MgO 活性对新型水化硅酸镁水泥性能的影响] . | Bulletin of the Chinese Ceramic Society , 2023 , 42 (1) , 57-65 . |
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本实用新型公开了一种骨料筛选器，涉及骨料筛选技术领域，该骨料筛选器，包括外壳，所述外壳的底部固定连接有减震支撑柱，所述外壳的表面设置有调节组件，所述调节组件包括固定杆，所述固定杆的端部与外壳的内壁固定连接，所述固定杆的表面固定连接有固定筛网，所述固定筛网的侧面与外壳的内壁固定连接，所述固定筛网的顶部活动连接有移动筛网，所述移动筛网与外壳的内壁活动连接，所述移动筛网的侧面固定连接有连接板，所述连接板贯穿外壳的内壁并远离移动筛网一端固定连接有连接座。通过设置固定筛网、移动筛网、连接板、固定框架和螺纹杆，达到了能够调节孔径的效果。
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| GB/T 7714 | 林旭健 , 颜鸿亮 . 一种骨料筛选器 : CN202222042386.5[P]. | 2022-08-04 00:00:00 . |
| MLA | 林旭健 et al. "一种骨料筛选器" : CN202222042386.5. | 2022-08-04 00:00:00 . |
| APA | 林旭健 , 颜鸿亮 . 一种骨料筛选器 : CN202222042386.5. | 2022-08-04 00:00:00 . |
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本实用新型公开了碱激发水泥透水混凝土路面通孔清洗装置，包括箱体、清灰刷盘、活动内螺纹块和安装螺丝，所述清灰刷盘设置于箱体底部的中部，所述清灰刷盘的顶部设置有固定板。本实用新型通过在添加了清灰刷盘和冲喷清洗头配合实现进行先刷扫孔隙中灰尘后在通过冲喷清洗头进行冲洗工作，减少灰尘与水混合物的产生堆积，提高对孔隙通孔清洗的工作效率，且第一旋转驱动机构驱动后带动螺杆转动，使内部与其螺纹连接的活动内螺纹块配合滑块沿着内置滑槽滑动实现在活动槽内部上下活动，则可调节清灰刷盘与地面间距，便于对不同坡高度位置的混凝土路面进行刷扫清洁工作。
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| GB/T 7714 | 张华 , 夏昌 , 季韬 et al. 碱激发水泥透水混凝土路面通孔清洗装置 : CN202222667708.5[P]. | 2022-10-11 00:00:00 . |
| MLA | 张华 et al. "碱激发水泥透水混凝土路面通孔清洗装置" : CN202222667708.5. | 2022-10-11 00:00:00 . |
| APA | 张华 , 夏昌 , 季韬 , 梁咏宁 , 林旭健 . 碱激发水泥透水混凝土路面通孔清洗装置 : CN202222667708.5. | 2022-10-11 00:00:00 . |
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本实用新型公开了碱矿渣透水砖加压振实装置，包括机架、夹具盘和基板，机架的内部安装有振实平台。本实用新型通过安装有第一加压模具板和第二加压模具块等，使得装置优化了自身的性能，启动两个伸缩驱动机构，带动对应的固定座向下移动，使得第一加压模具板和第二加压模具块皆嵌入模具槽内部，实现对于多个物料的加压处理，并且通过在每组加压机构的第一加压模具板上安装有压力传感器，可以监测施加的压力，并将监测到的数据发送给外接的控制柜，进而便于使用者智能化调节碱矿渣透水砖加工时施加的压力，提升了加工品质，并且利用该种结构，可以一次性完成六个碱矿渣透水砖的加压振实，提升了加工效率。
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| GB/T 7714 | 张华 , 傅大宝 , 梁咏宁 et al. 碱矿渣透水砖加压振实装置 : CN202222667685.8[P]. | 2022-10-11 00:00:00 . |
| MLA | 张华 et al. "碱矿渣透水砖加压振实装置" : CN202222667685.8. | 2022-10-11 00:00:00 . |
| APA | 张华 , 傅大宝 , 梁咏宁 , 季韬 , 林旭健 . 碱矿渣透水砖加压振实装置 : CN202222667685.8. | 2022-10-11 00:00:00 . |
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