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学者姓名：林旭健
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Abstract ：
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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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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本实用新型公开了碱矿渣隧道防火涂料光催化性能测试装置，包括主机体、旋转轴和旋转盘，主机体顶部的中心位置活动设置有旋转轴，旋转轴的顶部固定有旋转盘，旋转盘的顶部放置有样品体，旋转盘顶部的两侧固定有伸缩驱动件，伸缩驱动件的一端连接有夹持件，夹持件夹持到样品体的外部，伸缩驱动件的外部通过支架固定有套筒，套筒的内部滑动设置有限位滑杆，限位滑杆的一端与夹持件相互连接，本实用新型通过将样品体放到旋转盘的顶部，然后通过启动伸缩驱动件，伸缩驱动件就会使夹持件进行移动，夹持件就会夹持到样品体的外部，从而对样品体进行固定，防止样品体掉落。
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| GB/T 7714 | 江晖 , 季韬 , 胡振程 et al. 碱矿渣隧道防火涂料光催化性能测试装置 : CN202222589092.4[P]. | 2022-09-29 00:00:00 . |
| MLA | 江晖 et al. "碱矿渣隧道防火涂料光催化性能测试装置" : CN202222589092.4. | 2022-09-29 00:00:00 . |
| APA | 江晖 , 季韬 , 胡振程 , 梁咏宁 , 林旭健 . 碱矿渣隧道防火涂料光催化性能测试装置 : CN202222589092.4. | 2022-09-29 00:00:00 . |
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本实用新型公开了基于5G技术的隧道防火涂料喷涂装置，包括喷洒装置、涂料罐、喷涂装置主体和5G通讯模块，喷涂装置主体底部的四个拐角处均设置有行动轮，且喷涂装置主体的顶端设置有涂料罐，涂料罐的一侧设置有控制面板，且控制面板的内部设置有5G通讯模块和中央处理芯片，喷洒装置的顶端均匀分布有喷头，涂料罐内部的底端设置有2组水泵。本实用新型通过安装有喷涂装置主体、行动轮、水泵、导管、喷洒装置、喷头、控制面板、中央处理芯片以及5G通讯模块，预先在隧道内铺设轨道，远程启动水泵将涂料罐内的防火涂料抽到喷洒装置中由喷头喷出到隧道的内壁上，自动化程度较高，无需工人手动进行喷涂，安全性更高。
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| GB/T 7714 | 宁英杰 , 倪道喜 , 林旭健 et al. 基于5G技术的隧道防火涂料喷涂装置 : CN202222588931.0[P]. | 2022-09-29 00:00:00 . |
| MLA | 宁英杰 et al. "基于5G技术的隧道防火涂料喷涂装置" : CN202222588931.0. | 2022-09-29 00:00:00 . |
| APA | 宁英杰 , 倪道喜 , 林旭健 , 吴颖骏 , 梁咏宁 , 季韬 . 基于5G技术的隧道防火涂料喷涂装置 : CN202222588931.0. | 2022-09-29 00:00:00 . |
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本实用新型公开了隧道碱激发水泥喷射混凝土的喷射装置，包括底座和托台，托台顶端的两侧皆转动安装有副轴，副轴的顶端固定有托盘，托盘的顶端固定有动力箱，托盘的两侧外壁上皆固定有连接架，两组连接架之间转动安装有中空碱激发水泥物料盘，中空碱激发水泥物料盘一侧的外壁上安装有水泥喷管，且水泥喷管远离中空碱激发水泥物料盘的一端安装有喷嘴，中空碱激发水泥物料盘的另一侧外壁上安装有进料管。本实用新型利用摆动式双喷嘴的碱激发水泥物料泵送形式，提高装置的物料泵送范围，提高碱激发水泥物料在隧道内壁上的覆盖效率，并省去工作人员手动调试装置喷射方向的作业内容，降低工作人员的作业负担。
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| GB/T 7714 | 郑东明 , 梁咏宁 , 叶永斌 et al. 隧道碱激发水泥喷射混凝土的喷射装置 : CN202222588848.3[P]. | 2022-09-29 00:00:00 . |
| MLA | 郑东明 et al. "隧道碱激发水泥喷射混凝土的喷射装置" : CN202222588848.3. | 2022-09-29 00:00:00 . |
| APA | 郑东明 , 梁咏宁 , 叶永斌 , 林旭健 , 季韬 . 隧道碱激发水泥喷射混凝土的喷射装置 : CN202222588848.3. | 2022-09-29 00:00:00 . |
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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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Recycled aggregate concrete (RAC) prepared with recycled coarse aggregate (RCA) has more complex material phases on the meso scale compared to natural aggregate concrete (NAC), including the old virgin aggregate, the new/old mortar, and the three types of interfacial transition zone (ITZ). These mesoscopic material phases would influence the RAC to external sulfate attacks in different ways. This paper provides a new look at the performance of RAC subjected to external sulfate attacks by considering such influence. The quality and quantity of the multiple mesoscopic phases were changed by taking varying water-to-binder ratios (i.e., w/b) and volumetric fractions of RCA (i.e., VRCA), respectively. The changes in properties of both the material phases on the meso scale and concrete on the macro scale subjected to external sulfate attacks were experimentally investigated. The old mortar and ITZ phases (regardless of the ITZ type) were identified as the weaker phases against external sulfate attacks as their microhardness deteriorated faster than that of the new mortar. Improving the quality of the new mortar/new ITZ phases by taking a lower w/b can greatly enhance RAC's resistance to external sulfate attacks: the ingress of sulfate ions was retarded, meanwhile the degradation in compressive strength and dynamic elastic modulus were postponed obviously. Increasing the volumetric fraction of old virgin aggregates by taking a higher VRCA can also help RAC sustain better under sulfate attacks, even though it was accompanied by the simultaneously increasing quantity of the old mortar and ITZ which were identified as the weaker phases against sulfate attacks. Basically, changing the quality of the multiple mesoscopic material phases had more remarkable effects on RAC's sulfate resistance than changing the relative quantity ratios. This paper thereby suggests that RAC's sulfate resistance should be better enhanced by the strengthening or removal of the old mortar phase, or by the improvement of the new mortar and ITZ phases, rather than adjusting their quantity ratios in concrete.
Keyword ：
External sulfate attacks External sulfate attacks Mesoscopic material phases Mesoscopic material phases Recycled aggregate concrete Recycled aggregate concrete Volumetric fraction of aggregate Volumetric fraction of aggregate Water -to -binder ratio Water -to -binder ratio
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| GB/T 7714 | Zhang, Hongru , Liu, Wenshen , Zhang, Jingbo et al. A new look at the resistance of recycled aggregate concrete (RAC) to the external sulfate attacks: The influence of the multiple mesoscopic material phases [J]. | JOURNAL OF BUILDING ENGINEERING , 2023 , 64 . |
| MLA | Zhang, Hongru et al. "A new look at the resistance of recycled aggregate concrete (RAC) to the external sulfate attacks: The influence of the multiple mesoscopic material phases" . | JOURNAL OF BUILDING ENGINEERING 64 (2023) . |
| APA | Zhang, Hongru , Liu, Wenshen , Zhang, Jingbo , Liu, Fujiang , Lin, Xujian , Ji, Tao . A new look at the resistance of recycled aggregate concrete (RAC) to the external sulfate attacks: The influence of the multiple mesoscopic material phases . | JOURNAL OF BUILDING ENGINEERING , 2023 , 64 . |
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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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