The effect of four types of admixtures (flyash, waterreducing agents, an air-entraining agent and limestone mineral powder) on the strength-porosity relationship Vol. l, No. l ADMIXTURE, STRENGTH, POROSITY, CEMENT PASTE Notation o = weight of cement in grams. vo = specific volume of cement. w n = we
Prognosis of characteristics of multicomponent materials on the example of flexural strength of portland cement
✍ Scribed by Lj.M. Dragićević; M.M. Ršumović
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 462 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0008-8846
No coin nor oath required. For personal study only.
✦ Synopsis
In this paper we have made prognosis of flexural strengths of portland-cement after 3 and 28 days and pointed out importance of application of determined mathematical methods, which can be used for forming of mathematical models. Using of D-optimal plans and plans including "pseudocomponents", original mathematical models are realized, which make possible, for different composition of four-component C-S-A-F system, to determine strength values of portland-cement after 3 and 28 days. For forming of corresponding mathematical models, for realization of qualitative prognosis, a polynomial of fourth order was used. Calculation of polynomial coefficients and determination of analytically form are made on calculator PDP ll/40.
📜 SIMILAR VOLUMES
Curing techniques and curing duration have crucial effects on the strength and other mechanical properties of mortars. Proper curing can protect against moisture loss from fresh mixes. The objective of this experimental work is to examine the compressive strength of ordinary Portland cement mortars
Studies of porous hydrated portland cement have been carried out to assess quantitatively some aspects of microstructural deformation due to applied stress. Hydrated portland cement paste cured for six years at a water/cement ratio of 0.6 was sliced into discs 1.25 m~ thick. These were positioned in
Although the use of slag has many benefits, its low hydration at early stages causes the strength to be low. Hence, the uses of slag are restricted, even before it needs to be activated. In this investigation, a chemical method was used to activate the ordinary Portland cement-slag mortars (OSM). 37
Modern thermal power plants are producing large amounts of fly ash that is generally quite suitable for use as a supplementary cementitious material in concrete. However, for tilis purpose the fly ash utilization in the United States continues to remain low, mainly on account of lack of quality cont
The bioactivity of a modified Portland cement (wTC) and a phosphate-doped wTC cement (wTC-P) was studied at 37 °C in Dulbecco's Phosphate Buffered Saline (DPBS). The cements, prepared as disks, were analysed at different ageing times (from 1 day to 2 months) by micro-Raman and ATR/FT-IR spectroscopi