Abstract: This paper investigates the influence of limestone powder (LS) fineness on the early-age properties of portland cement paste. Blended pastes with LS were prepared based on volumetric ratio and their fresh properties, ...

Abstract: Manufactured sand (MS) has been increasingly used as fine aggregate for concrete. This paper proposes a prediction of the compressive strength of concrete with manufactured sand (MS-concrete) based on an ensemble classification ...

Abstract: South China Sea (SCS) abyssal circulation largely contributes to water renewal, energy budget, and sedimentary processes in the deep ocean. The three-dimensional abyssal circulation west of the Luzon Strait (LS) in the ...

Abstract: The deformation of a primary support is one of the difficult problems often encountered in the excavation of a deep-lying soft rock tunnel. Directed against the problems of the large deformation of the primary support, the ...

Abstract: In cold regions, the flow of outside air into a tunnel often causes freeze–thaw damage to the surrounding rock, and insulation methods are usually adopted to avoid this damage. In this study, the heat transfer in a multilayer ...

Abstract: The abundant natural volcanic ash (NVA) in East Africa is a prospective supplementary cementitious material that may be used to produce green and economical railway concrete. To mitigate the shrinkage of concrete with NVA, ...

Abstract: Topographic Rossby waves (TRWs) play an important role in deep-ocean dynamics and abyssal intraseasonal variations. Observational records from 15 current- and pressure-recording inverted echo sounders (CPIESs) and two ...