葛根与石膏配伍浅析

从病机环境、功效发挥方向以及临床应用三方面探讨了葛根与石膏配伍规律,分析认为葛根与石膏配伍主要针对热毒壅盛于机体的病证,通过作用于肌肉,促进肌肉的运动以散邪除热,临床可广泛运用于以浊邪堆积于机体、热毒壅盛为主要病机的相关病症,包括外感之热、内伤之热、肢体运动障碍、热盛灼津之口渴、热盛肉腐化痈成脓之证以及小儿与孕妇或产妇因热而引起的一系列见证等。     

调合法消毒对超硬石膏模型的强度和精度的影响

目的：研究调合法消毒对石膏模型抗弯强度,抗压强度和尺寸精度的影响.方法：实验组分别采用20g/L戊二醛、1g/L碘伏、5g/L84消毒液和对照组采用蒸馏水调拌超硬石膏粉制成长方体样品和上颌牙弓测量样品,用万能试验机测试其强度,用测量显微镜测量样品的长度,所得数据进行统计学处理.结果：采用的不同消毒液制取的超硬石膏试件,其压缩强度,弯曲强度及尺寸方面未出现明显的不同（P〉0.05）.结论：采用实验所选的消毒液调拌超硬石膏粉对超硬石膏的抗压强度,抗弯强度及精度无明显影响.     

Hydration and Mechanical Properties of Calcium Sulphoaluminate Cement Containing Calcium Carbonate and Gypsum under NaCl Solutions

Hydration characteristics and mechanical properties of calcium sulphoaluminate (CSA) cement with different contents of CaCO₃ and gypsum under NaCl solutions were studied, using the testing methods of isothermal calorimetry, X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), linear shrinkage, and compressive strength. Results show that CaCO₃ can promote hydration and reduce the hydration heat of CSA cement. The reaction between gypsum and C₄A₃S- releases a large quantity of heat in the initial hydration period; however, over 3 days of accumulation, the level of hydration heat is reduced. Under NaCl solutions, the aluminate phase has difficulty reacting with CaCO₃ to form carbonate phase but combines with chloride ions to form Friedel’s salt. On the contrary, gypsum reduces aluminate phase, and the content of Friedel’s salt is also reduced. Furthermore, CaCO₃ and gypsum both increase the total porosity of the CSA cement paste under NaCl solutions during the early curing phase, and over the long-term, pore structure is also optimized. CaCO₃ and gypsum reduce the linear shrinkage of CSA cement paste under NaCl solutions. Overall, the compressive strength of CSA cement is reduced with the addition of CaCO₃, and the trend will be sharper with the increase in CaCO₃. However, when it comes to gypsum, the compressive strength is almost the same during early curing, but in the long-term, compressive strength improves. Essentially, the compressive strength of CSA cement mortar with CaCO₃ and gypsum will improve under NaCl solutions.     

Fire Analysis of Timber-Framed Walls Lined with Gypsum

This investigation analyses the influence of the depth and the distance between studs on the fire resistance of lightweight timber-framed (LTF) walls lined with gypsum plasterboards. The simplified model used to determine the fire resistance in Eurocode EN 1995-1-2 provides very conservative values, as few parameters are considered. The new generation of Eurocode EN 1995-1-2 includes an upgrade of the simplified model, allowing us to predict the fire resistance of LTF wall assemblies more accurately. This separating function method considers the number, the thickness and the material of the protection layers, but does not explicitly consider the variation of the depth and the distance between the studs for the calculation of the insulation time of the assembly, besides including some limitations for both parameters. To demonstrate the influence of these parameters, 36 numerical simulations were carried out using the finite element method previously validated with experimental tests. The results obtained from the parametric analyses confirmed that such parameters affect the fire resistance of the LTF wall assemblies in a significant way. In addition, the results revealed an important contribution in the study of LTF wall assemblies against fire resistance, demonstrating the need for including extra geometric parameters in the simplified model in order to increase the accuracy of current models.     

腓骨内固定加管型石膏外固定治疗复杂Pilon骨折

目的探讨腓骨内固定加外固定治疗Pilon骨折的疗效。方法采用钢板螺钉内固定治疗腓骨骨折，然后用松质骨拉力螺钉或可吸收螺钉固定下胫腓关节，对压缩的胫骨取髂骨植骨，修复骨缺损，不做胫骨内固定手术，术后小腿管型石膏外固定。结果46例Pilon骨折，优36例，良5例，中3例，差2例。其中2例感染，皮肤伤口半年愈合，总优良率89．1％。结论有限内固定结合术后管型石膏外固定治疗Pilon骨折具有损伤小、愈合快、并发症少的优点。     

"蛙式"位石膏固定治疗小儿发育性髋关节脱位24例

目的观察"蛙式"位石膏固定治疗小儿发育性髋关节脱位的疗效。方法24例小儿发育性髋关节脱位患儿均采用闭合复位"蛙式"位石膏固定治疗。结果经1～2年随访,优良率87.5%。结论"蛙式"位石膏固定治疗小儿发育性髋关节脱位可以使脱位的关节良好复位,且不容易发生再移位。     

消毒剂调和法对口腔石膏模型表面硬度 压缩强度及抗弯强度的影响

目的 研究4种消毒剂调和法对3种口腔石膏模型表面硬度、压缩强度及抗弯强度的影响。方法 制作圆柱体金属模具,硅橡胶取模,分别用2%戊二醛、0.5%次氯酸钠、0.5% 84消毒液、0.5%三氯异氰尿酸4种消毒剂调和熟石膏、硬石膏和超硬石膏,以蒸馏水调和作为对照组,分别灌注石膏模型,测定其表面硬度、压缩强度及抗弯强度,并进行统计学分析。结果 4种消毒剂调和消毒后,3种石膏模型在表面硬度、压缩强度及抗弯强度方面与对照组相比差异均无统计学意义（P >0.05）。结论 4种消毒剂调和法对口腔石膏模型的表面硬度、压缩强度及抗弯强度均无明显影响。     

Study of the Mechanical and Physical Behavior of Gypsum Boards with Plastic Cable Waste Aggregates and Their Application to Construction Panels

The objective of this study was to analyze the physico-mechanical properties of gypsum boards including plastic waste aggregates from cable recycling. The plastic cable waste is incorporated into the gypsum matrix without going through any type of selection and/or treatment, as it is obtained after the cable recycling process. In the experimental process, gypsum boards of different dimensions were manufactured and tested for their Young’s modulus, shock-impact resistance, flexural strength, thermal conductivity, and thermal comfort. The results obtained show a significant increase in the elasticity of the boards with plastic waste (limited cracking), compliance with the minimum value of flexural strength, and a slight improvement in the thermal conductivity coefficient (lower energy demand) and surface comfort (reduced condensation and greater adherence). Therefore, the analyzed material could provide a suitable alternative to currently marketed gypsum boards, contributing to sustainable construction not only in new constructions, but also in building renovations.     

不同组成配比对合成半水石膏含量的影响

目的观察蒸馏水,氯化钙及丁二酸钠对二水石膏脱水生成半水石膏的影响。方法采用液相蒸压法,对蒸馏水,氯化钙及丁二酸钠三个影响因素进行试验分组,在相同加热加压条件下合成半水石膏,并用X线衍射分析仪测量其百分含量。结果当蒸馏水量与(二水石膏 氯化钙)比为165ml∶100g时合成的半水石膏百分含量较高;氯化钙与二水石膏比为1∶2时合成的半水石膏百分含量较高;丁二酸钠与(二水石膏 氯化钙)比为0.75g∶100g时合成的半水石膏百分含量较高。结论蒸馏水量对半水石膏合成的影响较大,而氯化钙及丁二酸钠影响较小。     

The Effect of POFA-Gypsum Binary Mixture Replacement on the Performance of Mechanical and Microstructural Properties Enhancements of Clays

Soft clay is categorized as problematic due to its weak and dispersive properties which requires stabilization. In Malaysia, there is another challenge, the increment of palm oil waste productions to meet the global demand for food oil. These two concerns motivate engineers to develop novel strategies for exploiting palm oil waste in soil stabilization. Utilizing POFA as a soil stabilizing agent is an economical and sustainable option due to that POFA contains high pozzolanic characteristics which make it more suitable and reliable to treat soft soil. This study uses the replacement portion of the soil with stabilizing agents -POFA and Gypsum; aiming to achieve Malaysia green technology goals by the balance of the economic expansion and environmental privilege. However, the aim of this study is to determine the effect of POFA-gypsum binary mixture replacement on the performance of mechanical and microstructural properties en-hancements of clays. Kaolin S300 is the control sample whereas POFA and gypsum are the used binders. The mechanical properties and shear strength with the curing period were tested. Results showed that treated clay marked increment of optimum water contents and reduction of maximum dry densities, a clear 200% of enhancement of treated clay’s compressive and shear strength with curing period as well as the amount of stabilizing agent to less than 15% of POFA and 6% of POFA. It is also found that as gypsum contains a high amount of lime (CaO), the results illustrate that strength raises significantly even with less curing time due to its high reactivity compared to silica and alu-mina. Overall, the results show an enhancement of mechanical and shear strength properties of treated kaolin supported by microstructural SEM imaging.