The properties of cement mortars with nano-SiO2 were experimentally studied. The amorphous or glassy silica, which is the major component of a pozzolan, reacts with calcium hydroxide formed from ...

Similarly, ultrasonic non-destructive testing of concrete shows that compared to ordinary concrete, magnetized water concrete has a denser internal …

Properties of White Portland Cement: It has properties similar to grey Portland cement, like high strength, durability, water and chemical resistance. However, white cement also has some unique properties that make it suitable for certain applications. Some of the properties of white cement are: Colour: The main property of …

White Cement. White portland cement has essentially the same properties as gray cement, except for color. It is readily available throughout North America. The color of white cement is determined by …

In white cement, the whiteness index is a very important parameter to control. ... A profile refinement method for nuclear and magnetic structures. Journal of Applied Crystallography ... Derriche Z. Influence of NaF, KF and CaF2 addition on the clinker burning temperature and its properties. Comptes Rendus Chimie. 2006; 9 …

The presence of magnetic particles in a ceramic body or glaze, both in mineral form or as free iron, causes a wide range of issues during the firing process. In the past, such flaws were covered by ornate and colorful glazes and decoration. However, modern ceramics producers do not have the luxury of implementing such methods.

Concrete mixes were prepared using magnetic field treated mixing water and compared with regular concrete mixes that were made with normal (non-magnetized) tap water. Magnetizing the mixing water ...

Samples of micro-silica/cement containing iron oxide, Fe 2 O 3, and doped with carbon-coated cobalt nanoparticles and free radical DPPH were prepared and studied by the magnetic resonance method.The concrete's main components (silica and cement) produced very complicated FMR/EPR (ferromagnetic and electron paramagnetic …

The chemical and microstructural changes within a white cement paste were characterized in situ using proton nuclear magnetic resonance spin–spin relaxation at 30 MHz, and X-ray diffraction.

PDF | The incorporation of strong magnetic powders (NdFeB) into cement mixtures has produced improved mechanical properties of cement pastes. The... | Find, read and cite all the research...

¹H nuclear magnetic resonance (NMR) relaxometry is used to characterise cement paste microstructure from the stand point of the pore water. Attention focuses primarily on pore-water interactions and the morphology of calcium-silicate-hydrate (C-S-H), the active phase of cement paste. The method is non-destructive and non-invasive.

Mineral admixtures (MA), like fly ash (FA), silica fume (SF), and slag (S), are usually added to cement-based materials to improve their compactness and further enhance their mechanical properties, permeability resistance, and durability. In this study, low-field nuclear magnetic resonance (LF-NMR) is adopted to explore the evolution of …

Properties of white cement concrete. The initial setting time of white cement is 100 minutes. The fineness of white cement is 395 kg/m 2. The brightness of white cement is 87%. The compact density of …

Complex and net shaped NdFeB magnets were easily obtained. The resulting cementitious formed magnets can be considered a magnetic cement, i.e., a cement …

In this paper, a three-layered cement-based wave-absorbing board is designed and prepared by mixing wave-absorbing fillers such as nano-Si 3 N 4, multi-layer nano graphene platelets (NGPs), nano-Ni, carbon fiber (CF) and carbon black (CB) into cement slurry. The effect of the amount of wave-absorbing fillers on the mechanical properties, …

Chemical Properties of Cement. The raw materials for cement production are limestone (calcium), sand or clay (silicon), bauxite (aluminum) and iron ore, and may include shells, chalk, marl, shale, clay, blast furnace slag, slate. Chemical analysis of cement raw materials provides insight into the chemical properties of cement.

The introduction of magnetic particles into cement matrices has also been another important method in recent years to enhance the mechanical and other properties of cement-based materials.

magnetic properties of white cement T04:01:28+00:00 Enhancement of electromagnetic shielding and Effect of hydration time on the structural and physical properties of White Portland Cement (WPC) is considered to be a critical and essential factor In this study effect of hydration time (360, 720, 1260, and 1450) min on the …

Magnetite was found to play an effective role in reinforcing cement matrix. The results showed that the cement paste reinforced by magnetite nanoparticles of …

The contact between the Steel Fiber and graphite is improved to make electrically conductive concrete. The strength is gained continuously till 3% where the maximum strength is gained which is 9. ...

The content of selected elements (Al, As, Ca, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, S, Ti, V and Zn) was measured in samples of the lichen Evernia prunastri exposed for 30, 90 and 180 days around a cement mill, limestone and basalt quarries and urban and agricultural areas in SW Slovakia. Lichens transplanted around the investigated quarries …

This study characterized the magnetic property and levels of heavy metals of the topsoils near a cement plant. The concentrations of five selected heavy metals (Pb, Cu, Zn and Cd) were measured on 32 topsoil samples (0–20 cm) collected near a cement plant via inductively coupled plasma/mass spectroscopy (ICP-MS).The orders of enrichment …

Research on cementitious materials, the most common building material, has been going on for over a century [1, 2].In the study of the mechanical and other properties of cementitious materials, it has been found that the water-cement ratio is an important factor affecting the strength of the material [].Normally, the smaller the water-cement …

Nanosilica (NS) behavior on hydration and synergistic characteristics of highly alkaline (HA) white cement pastes composites containing 5–25 mass % of NS (as substitution) was studied. The hydration kinetics behavior from 1 to 100 days was examined for all the blends e.g.: whiteness reflection (Ry), setting, compressive mechanical …

The properties of white cement. The whiteness is understandably one of the most important properties of white cement. This must be taken into account already in the selection of …

The micromechanical properties of Portland cement paste were investigated by the coupled nanoindentation and scanning electron microscope method. The mechanical parameters (e.g. indentation modulus and hardness) of individual active phases present in Portland cement paste were estimated by the proposed method.

It should be noted that the piezoresistive properties of Ni-CNTs cement-based composites which were induced by magnetic field exhibit anisotropy, especially in the percolation zone. At the CNT content of 1.2 vol%, Ni-CNTs cement-based composites parallel to MF have the highest FCR value (23.75%), which increases by 2.3 times …

Abstract. The incorporation of strong magnetic powders (NdFeB) into cement mixtures has produced improved mechanical properties of cement pastes. The magnetic cement (cementitious magnet) used a simple and inexpensive cement process to form complex forms of the NdFeB magnet. Particulate NdFeB has been distributed uniformly …

1757-899X/1219/1/012051. Abstract. The incorporation of strong magnetic powders (NdFeB) into cement mixtures has produced improved mechanical properties of …

Abstract. Enhanced functional properties of cement pastes were achieved by introducing hard magnetic powders (NdFeB) into cement mixtures. The magnetic cement (cementitious magnet) employed a simple and inexpensive cementitious process to form complex NdFeB magnet shapes. NdFeB particles were distributed uniformly in the …