水泥

By means of silty fine sand layers, the paper researches the grouting systems that consists of cement single liquid grouting material, MC super and thin cement single liquid grouting materials, cement and water glass of liquid grouting materials, MC super and thin cement and water glass of liquid grouting materials, TGRM single liquid grouting material, and HSC single liquid grouting material, respectively. The grouting design, grouting parameter, grouting result check of the karst cave No.2 and two passive countermarch returns to fill the situation are analyzed, which can provide an important reference for future tunnels under similar geological conditions.

针对2溶洞平导高压富水粉细砂层地质特点，研究出了由普通水泥单液浆、超细水泥单液浆、普通水泥－水玻璃双液浆、超细水泥－水玻璃双液浆、TGRM单液浆和HSC单液浆组成的注浆材料配套体系，并对2溶洞平导施工过程中出现的2次较为被动的后退回填局面以及施工中的注浆设计、注浆参数选择和注浆效果检查评定进行了总结分析，以期对类似工程的设计、施工提供借鉴价值。

Differential coefficient and difference simulation equation of gray model GM (1, 2), representing the relationship between 28d compressive strength and 4-32μ m particle content respectively is

颗粒粒级范围对强度的灰色系统关联度分析结果表明：对于普通硅酸盐水泥，4-8μm颗粒含量对水泥3d抗压强度的影响最大，8-16μm颗粒含量对水泥28d抗压强度的影响最大，对水泥90d抗压强度，则16-24μm颗粒的影响最大。28d抗压强度与4-32μm颗粒含量灰色模型GM（1，2）的微分方程和差分模拟式分别为

Directed against the existing problems in traditional mixing process, secondary mixing techniques, such as pre-mix cement mortar, pre-mix cement paste, sand enveloped with cement paste, coarse aggregate enveloped with cement paste and aggregate enveloped with cement paste are discussed, and the effect of different mixing technological processes on concrete mixing quality is studied. The homogeneousness, compression strength of concrete and the power consumption are tested during the test, and compared with the traditional mixing method.

针对传统混凝土搅拌工艺中存在的问题，讨论了先拌水泥砂浆法、先拌水泥净浆法、水泥裹砂法、水泥裹石法、粗细骨料全造壳法等二次搅拌工艺，研究了不同工艺流程对混凝土搅拌质量的影响，测试了不同条件下混凝土的匀质性、抗压强度指标及功率消耗，并与传统搅拌工艺进行了对比试验。

Capable of producing aluminate, sulphoaluminate, admixture three series over 10 varieties, main products are cement, PAC, low alkalinity aluminum sulfate cement, hard-Express expansion sulphoaluminate Cement, double-quick cement, concrete expansion agent, quick-setting agent, efficient sealing agent, aluminum powder and calcium, such as expansion of the clinker.

能生产铝酸盐，硫铝酸盐，外加剂三大系列十多个品种，主导产品有铝酸盐水泥、聚合氯化铝，低碱度铝硫酸盐水泥，特快硬微膨胀硫铝酸盐水泥，双快水泥，混凝土膨胀剂，速凝剂，高效堵漏剂，铝酸钙粉和膨胀熟料等。

The different proportion of high fineness lime stone, GGBS powder and fly ash was added into P-I 42.5R Portland cement to prepared several samples by orthogonal experiment design, the particle size distribution of sample was obtained by RRSB linear regress and the physical performance of the sample was tested.

按正交试验方法设计了不同比例高细石灰石粉、矿渣粉和粉煤灰掺入到P·I42.5R硅酸盐水泥中的多组样品，使用RRSB线性回归得到样品的颗粒群分布，并检验样品的物理性能：结果表明，高细石灰石粉和矿渣粉可以明显改善水泥的粒度分布，增加水泥细微颗粒含量，显著提高水泥早期、后期和长期强度。

This paper, aiming at the weak points of the low early strength and the slow setting and hardening of portland fly-ash cement , according to the forming mechanism of cement clinker minerals, cement clinker minerals are choosen, fly ash is used as a substitute of clay as raw materials, early and high strength type cement clinker has heen developed, the amount of alit in the clinker is very high.

本文针对粉煤灰水泥早强低，凝结硬化慢等缺点，根据水泥熟料矿物的形成机理，用粉煤灰代替粘土作原料，对熟料矿物进行优化组合，成功地研制出了一种高硅酸三钙的早期强度高的水泥熟料，这种熟料可掺入30％一40％粉煤灰，生产出425R型粉煤灰水泥。

A study on pore structure of mortar specimens from high belite cement, Portland cement and medium-heat cement was carried out and the structure of cement paste of HBCC was investigated with the help of theory and test method for high molecular compounds.

本文对高贝利特水泥、硅酸盐水泥、中热水泥胶砂的孔结构进行了观察分析，并借鉴高分子学科的理论和试验方法，初步探讨高贝利特水泥混凝土中C-S-H凝胶的结构。

Basic experiments prove the possibility of composite of high silica belite aluminosulphate cement and blastfurnace slag , and at the same time discusses the composite mechanism.

在分析硫铝酸盐水泥应用现状及存在问题的基础上，提出了高硅贝利特-硫铝酸盐水泥与矿渣复合，能够进一步完善硫铝酸盐水泥的性能及扩大硫铝酸盐水泥的应用范围。

Furthermore, in two separate reports, workers noted that cleaning the endosteal surface contributed to augmented cement intrusion into bone and enhanced the interface shear strength.25,26 Contemporary cementation techniques include cleaning of the endosteal bone with pulsed lavage, retrograde insertion, and sustained pressurisation to optimise micro-interlock.

此外，两组独立研究发现，清洗骨床能够促进骨水泥侵入骨间隙从而提高界面的抗剪力强度。现代骨水泥技术包括脉压冲洗骨内膜界面，逆行注入骨水泥，持续加压以促进骨水泥微交锁作用。

For patients unfit for long revision procedures, and when the cement mantle is well preserved, especially in the peritrochanteric region, cement-in-cement revision to a longer stem, following adequate preparation of the old mantle to promote bonding between new and old cement, is possible.9 Unpublished data and personal communication with the Hip Unit of the Royal Devon and Exeter Hospital have provided us with encouraging results in this group of patients.

由于患者不适宜进行时间较长的翻修手术，当其骨水泥壳套得以完整保存的时候，尤其是在粗隆周围区域，对老的壳套进行足够的准备工作，以促进新老骨水泥之间的结合后，进行更长柄的骨水泥对骨水泥翻修也是可能的[9] 。从英国得文暨艾克斯特皇家医院髋关节科提供给我们的一些未发表的数据和个人的信息来看，这一组患者有着令人鼓舞的结果。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。