A study was carried out, using heat flow calorimetry, XRD, FTIR and SEM imaging analysis, of different influences which were exerted by the type of polymer, on the hydration behaviors of cement pastes
C3S is a nesosilicate phase which reacts with water to give C-S-H and CH.The precipitation of these hydration products has long hampered accurate investigations of the C3S dissolution alone and most r
In this work we address the feasibility of in silico studies of the influence of superplasticizers on the microevolution of cement suspensions during early hydration based on Molecular Dynamics (MD) a
Cement is an intricate component of stable wellbores as it provides zonal isolation, mechanical reinforcement of the casing and protects casing from corrosive fluids.The focus of this research was to
For the purpose of effective use of fly-ash, which is a by-product thermal power generation, fly-ash is applied to the precasted concrete products which is substituted by a large amount of fly-ash in
Cessation of the hydration of tricalcium silicate (Ca3SiO5, C3S) has been shown to occur at a relative humidity (RH) less than 80%.However, the specific reduction in reaction rate that occurs with pro
The reaction of water with tricalcium silicate (Ca3SiO5, C3S) is the most crucial reaction which results in strength development in cementitious materials.In spite of several decades of study, details
The problem of optimizing underlying functions has been well studied in recent several years.The purpose of algorithms in this research field is to find the optimizer of the underlying problem by requ
粒子群优化算法(Particle Swarm Optimization,PSO)由于其算法简单高效,已被广泛用于各种寻优问题。种群规模是PSO算法的一个重要参数,表示粒子种群中粒子的个数,种群规模大小对算法特性和计算代价影响很大,种群太小,会造成局部收敛；而种群太大,计算代价太高而且收敛速度慢。经典PSO方法中,种群大小是固定的,随着优化迭代的更新,种群中的粒子向最优点收敛,此时过大种群规模会增加
薄板结构是工程和生活中常见的结构之一。它具有结构轻，成本低和吸收能量高等优点，被广泛的应用于工程组合结构。而这些结构屈曲问题是人们比较关注的。薄板结构的抗屈曲设计和研究一直没有间断。通常采用局部附加结构等方法阻止向某一或某类屈曲模态的发展。注意到近些年纳米技术的迅速发展，如表面纳米技术。材料的表面纳米化会影响和改变其的力学性能，如弹性模量，屈服应力，强化模量和延性等。这些性能依赖于表面纳米化程度，