This paper describes an experimental investigation into the pore structure of cement mortar using mercury porosimeter. Ordinary Portland cement, manufactured sand, and natural sand were used. The porosity of the manufactured sand mortar is higher than that of natural sand at the same mix proportion; on the contrary, the probable pore size and threshold radius of manufactured sand mortar are fin...

In this study, the workability and reaction mechanism of metakaolin (MK) based geopolymer blended with rice husk ash (RHA) silica fume (SF) was investigated. The prepared samples were subjected to tests including compressive strength fluidity tests. X-ray diffraction (XRD) Scanning electron microscope (SEM) employed explore phase composition microstructure geopolymers. molecular bonding informa...

Nano-silica is an important admixture for ultra-high performance concrete (UHPC). However, complex production process and agglomeration problem of conventional nano-silica significantly limit its application in UHPC. In this study, a novel highly dispersed colloidal olivine (C-OnS) developed. The properties C-OnS are characterized with laser light scattering, nuclear magnetic resonance zeta-pot...

Many petrophysical properties (e.g. permeability, electrical resistivity etc.) of tight rocks are very stress sensitive. However, most mercury injection measurements are made using an instrument that does not apply a confining pressure to the samples. Here we further explore the implications of the use and analysis of data from mercury injection porosimetry or mercury capillary pressure measure...

A cement-based stabilizer is effective in stabilizing the peat soft ground with extremely high compressibility and low shear strength for road construction. Moreover, stabilized soil occasionally fractured reused embankments, depending on construction site conditions. In such circumstances, subjected to stress history owing stabilization, crushing, reconstitution. this study, evaluate implicati...

In this study, calcium oxide (CaO) was used as an additive to form pores in a cellulose acetate (CA) and at the same time improve thermal stability of acetate. When CA/CaO membrane exposed water pressure, CA matrix area plasticized by CaO particles became weakened channels were formed. addition, high melting point its bonding with carbonyl group caused crosslinking effect. We succeeded manufact...

The present study focused on investigating the differences in properties between calcined and milled aluminosilicates with different particle size distributions. Two types of clay, i.e., kaolin kaolinitic claystone, were subjected to calcination at 750 °C, subsequent milling obtain fractions distinct These then combined a potassium alkaline activator quartz sand 50:50 weight ratio form geopolym...

Abstract Soft rocks can weather and lose their structure within a short time due to drying out rewetting. Thus they are very sensitive weathering. Since these often found in the shallow subsurface, of great practical relevance foundation constructions. The rock properties change during weathering process. Particularly relevant is softening material decrease its mechanical properties, which dete...