Prismatic (20 x 55 x 90 mm) reinforced mortar specimens (0.35:0.50
water-cement ratio and 1:3 cement-sand ratio) were made (Figure 1) and cured at 100% RH.
Figure 8 shows the relationship between the
water-cement ratio and funnel viscosity of expandable material with high water content.
Material Unit Weight (kg/[m.sup.3]) 20 MPa 30 MPa Slump (cm) 10 [+ or -] 2 10 [+ or -] 2 Cement 395 468 Crushed stone 1222 1085 Sand 605 700 Free water 205 205
Water-cement ratio (%) 52 44 Gmax (mm) 20 20 s/a (%) 32 39 Calcium stearate 0, 1, 5, 10 0, 1, 5, 10 Unit Weight Material (kg/[m.sup.3]) 40 MPa Slump (cm) 10 [+ or -] 2 Cement 535 Crushed stone 870 Sand 750 Free water 210
Water-cement ratio (%) 0.39 Gmax (mm) 20 s/a (%) 45 Calcium stearate 0, 1, 5, 10 Table 2: The quantity of specimens.
Among specific topics are the experimental investigation of the influence of
water-cement ratio on air-void parameters of cement concrete, particle flow erosion precision electroforming technology, the preparation and adsorption property of nano-rods hydroxyapatite using cation surfactant templates, the energy and environmental performance of a project using solar hot water systems with vacuum tube materials, and the application potential of climate-adaptive window materials.
The rheological parameters of cement grout are time varying and depend significantly on the grouting time, the
water-cement ratio, and the water temperature.
Water-cement ratio was constant for all prepared mixes (Table 1).
Dosac Lite stores only one program, precisely repeating the
water-cement ratio and mixing time batch after batch, for as long as water and grout are available.
Water-cement ratio can be maintained, while still providing workability through dispersants.
S Bhanja, B Sengupta,
Water-cement ratio law and silica fume concrete mix design.
Both compared methods showed a variation in porosity, depending on the
water-cement ratio. The concrete of a lower W/C, amounting to 0.44, was more porous that the concrete with the ratio W/C = 0.58.