The mine water environment in underground reservoirs poses great threat to the durability of artificial concrete dams, mainly due coupled sulfate and drying-wetting cycles. As a novel response, application Engineered Cementitious Composites (ECC) featured by strain-hardening characteristics inherent crack control ability dam is proposed. special influence simulated high cycle on ECC investigated this study, measuring mass compressive properties evolvement characterizing microstructure phase...

The dry-wet cycle is one of the aggressive environmental conditions suffered by concrete. This paper focuses on experimental study and theoretical simulation water distribution in normal- high-strength concrete through cycles. results show that under cycles, variation interior humidity occurs mainly within a certain depth from drying/wetting face. called influencing relative region periodically changes As undergoes wetting, fast rise short time, finally reaches approximately 100%. By...

Abstract The dry–wet cycle is one of the aggressive environmental conditions suffered by concrete. This article focuses on experimental study and theoretical simulation shrinkage concrete during cycles. results show that interior relative humidity periodically changed As undergoes wetting, a fast increase in takes place short time then reaches stable level, which depends strength or water-to-cement ratio In contrast, as drying, does not drop immediately but decreases gradual manner....

The physical and mechanical characteristics of seawater coral sand engineered cementitious composites (SCECC) were examined through uniaxial compression, three-point bending, splitting tensile tests. properties scrutinized under varying fiber volume fraction conditions (V = 0%, 0.575%, 1.150%, 1.725%, 2.300%). experimental results indicated that the compressive strength, bending split strength SCECC tended to increase with rise in fraction. strengths attained their maximum values 45.88,...

Benefiting from instrumental global dependency modeling of self-attention (SA), transformer-based approaches have become the pivotal choices for numerous downstream visual reasoning tasks, such as question answering (VQA) and referring expression comprehension (REC). However, some studies recently suggested that SA tends to suffer rank collapse thereby inevitably leads representation degradation transformer layer goes deeper. Inspired by social network theory, we attempt make an analogy...

This article focuses on the modeling of shrinkage stress and evaluation induced cracking in early-age concrete. In modeling, an integrative model for autogenous drying predictions concrete at is introduced first. Second, a taking both cement hydration moisture diffusion into account used to calculate distribution internal humidity Using above two models, ring column from cast are calculated. Meanwhile, test utilized identify time three kinds concretes with compressive strength 28 days around...

The effect of internal curing using pre-soaked lightweight aggregate in high-strength calcium sulfoaluminate cement concrete on shrinkage and humidity was investigated. Five mixture proportions with induced water (absorbed by aggregate) to (w IC /c) ratios 0, 0·03, 0·06, 0·09 0·12 were used the experiments. experimental results show that decrease is gradually reduced an increase w /c ratio. Accordingly, both autogenous drying also /c. Internal cannot eliminate completely because part...

In this paper, the effect of internal curing with pre-soaked lightweight aggregate (PSLWA) on shrinkage and interior relative humidity four series concretes compressive strength at 28 days around 30MPa, 60MP, 90MPa 100MPa is investigated. The induced cracking performance evaluated concrete-steel composite ring tests. results show that development concrete since casting exhibits first a vapor saturated stage (RH=100%, I), followed by gradually reducing (RH<100%, II). Under sealing, center...

An adiabatic temperature rise (ATR) test was used to determine the degree of cement hydration in concrete. In experiments, emphasis placed on influences water cementitious material ratio (w/b) and aggregate content ATR development hydration. A total nine concrete mixtures with three w/b ratios (0·30, 0·43, 0·62) contents (50%, 60%, 70% by volume) were tests. The experimental results show that, for a given content, lower ratio, higher rise. For effects age process may be taken into...

Polyvinyl alcohol (PVA)-steel hybrid fiber reinforced engineered cementitious composites (ECC) characterized by optimal combination of high strength and ductility were developed recently. These exhibit even tighter crack width than normal ECC, showing great potential for lower permeability in cracked state, consequently improving the durability ECC structures. In addition, wide variety promising applications underground or hydraulic structures calls knowledge on mechanical behavior...

Federated learning (FL) is an emerging promising privacy-preserving machine paradigm and has raised more attention from researchers developers. FL keeps users' private data on devices exchanges the gradients of local models to cooperatively train a shared Deep Learning (DL) model central custodians. However, security fault tolerance have been increasingly discussed, because its custodian mechanism or star-shaped architecture can be vulnerable malicious attacks software failures. To address...

Visual Question Answering (VQA) is a vital yet challenging task in the field of multimedia comprehension. In order to correctly answer questions about an image, VQA model requires sufficiently understand visual scene, especially vision-semantic reasonings between two modalities. Traditional relation-based methods allow encode pairwise relations objects boost performance. However, this simple strategy deficient exploit abundant concepts expressed by composition diverse image objects, leading...

The reasonable layout of cold chain logistics base facilities in Jinan is an important path to promote the healthy development logistics. location selection must be closely related economic surrounding area and industrial planning city, cannot separated from environment. At same time, close consumer market, which can reduce transportation cost, expand radiation radius increase purchasing power consumers. This paper first explains City, then analyzes site based on Analytic Hierarchy Process...

Several studies have recently pointed that existing Visual Question Answering (VQA) models heavily suffer from the language prior problem, which refers to capturing superficial statistical correlations between question type and answer whereas ignoring image contents. Numerous efforts been dedicated strengthen dependency by creating delicate or introducing extra visual annotations. However, these methods cannot sufficiently explore how cues explicitly affect learned representation, is vital...

<p indent="0mm">Because of the significant characteristics cementitious grouting materials (‘CGM’) include high fluidity, micro expansion, and strength, it has been widely used in various engineering projects showing a trend continuous differentiation properties. For development application CGM, history summarized stages firstly. second, classification CGM based on its properties, field, correlation between each other analyzed systematically. Typical cases with different uses were introduced...