The use of nanomaterials in concrete has shown promise, and the several types cementitious compounds been found to guarantee greater physical–mechanical properties improvements microstructure. mineral admixtures, such as silica fume, ensures improvement interfacial transition zone (ITZ) between aggregate paste high-performance (HPC). Thus, this work evaluates performance superplasticizer additi...

Concrete naturally contains a large number of circular-like stochastic pores which weaken the tensile strength concrete and change crack propagation path. This study investigates influences size distribution spatial on fracture behavior based splitting test. The mesoscale model containing coarse aggregate, mortar, interface transition zone (ITZ), circular is established to simulate initiation, ...

Part of the tunnel spoil can not be used for concrete due to alkali-aggregate reaction (AAR). Water is an indispensable condition AAR, so separating from water great benefit controlling AAR. This paper investigates modification and aggregate by hydrophobic impregnation organic coating then evaluates their waterproof mechanical properties dynamic contact angle (DCA), ultrasonic wave velocity, sc...

Five recycled coarse aggregate (RCA) treatment techniques including flow-through carbonation, pressurized wet nano silica (NS) pre-spraying and combined carbonation with NS pre-spraying, were utilized to improve the performance of concrete (RAC). The characteristics stress–strain curves RACs peak stress, strain, elastic modulus, ultimate strain toughness evaluated after using above RCA techniqu...

Concrete is non-homogeneous and is composed of three main constituent phases from a mesoscopic viewpoint, namely aggregates, mortar matrix, and interface transition zone (ITZ). A mesoscale model with explicit representation of the three distinctive phases is needed for investigation into the damage processes underlying the macroscopic behaviour of the composite material. This paper presents a f...

Methodologies are developed for analyzing failure initiation and crack propagation in highly heterogeneous concrete mesostructures. Efficient algorithms proposed Python to generate pack geometric features into a continuous phase. The phase represents the mortar matrix, while aggregates voids of different sizes represent randomly distributed within matrix. cohesive zone model (CZM) is utilized i...

This paper presents ',,n iml~lcmcntcd thct~ry fnr quanlifying noun phr:.i.,.;cs in clausc.s ctmt:mting ct)pulnr verbs (e.g.. "he" ~md "bcCOIllC'). Ih(~ccctling fr()nl Icccnt thcorcticnl work I)y Jackcn(Ioll[ I')X31. this c(,uputati(,tal theory recognizes the dependence ol" the quantification dccisit)n tm the dcl~nitcness, in(lclhfitcncss, or cla'~nncs.s hi" I)olh the subject and ()hjcct of c(ap...

This experiment compared the effect of computerized visual feedback (computer assisted instruction) with traditional play interaction (personal instruction) in promoting vocal imitation in children with autism. Ten non-verbal children with autism participated in ten sessions. Each session was composed of four sections: a parent and a trainer interacted with the child on the computer or using pl...

A numerical method from the mesoscopic point of view is proposed to describe the fracture process of concrete. At mesoscopic level, concrete is considered as a three-phase composite consisting of mortar matrix, coarse aggregate and interfacial transition zone (ITZ) between them. According to the grading of coarse aggregate obtained from sieve analysis, the random aggregate models with polygonal...

In this paper, we propose the alignment of trees as a measure of the similarity between two labeled trees. Both ordered and unordered trees are considered. An algorithm is designed for ordered trees. The time complexity of this algorithm is O( IT a I . ITz l . (deg(T I ) + degqT2))2). where I Til is the number of nodes in Ti and de6(T~) is the degree of T i, i -I. 2. The algorithm is faster tha...