Showing papers by "Francisca Puertas published in 2002"
TL;DR: In this article, the authors investigated the expansion of alkali-activated granulated blast furnace slag (AAS) cement mortars with reactive aggregate due to alkali−silica reaction (ASR) and found that the expansion occurs at a slower rate than OPC mortars under similar conditions.
121 citations
TL;DR: In this paper, the physicochemical properties and mechanical properties of ternary cements made by Portland cement, fly ash and limestone are studied, and the results show that fly ash acts as grinding agent by reducing the required time to obtain the same percentage of particles retained on a 80-μm sieve as the standard cement.
71 citations
TL;DR: Fluorellestadite, Ca10(SiO4)3(SO 4)3F2, has been synthesized as single phase as discussed by the authors, and the refinement of its crystal structure converged to RWP=12.33% and RF=4.58%.
Abstract: Fluorellestadite, Ca10(SiO4)3(SO4)3F2, has been synthesized as single phase. This compound crystallizes in the apatite type structure, s.g. P63/m, with parameters a=9.4417(1) A, c=6.9396(1) A and V=535.76(1) A3. The refinement of its crystal structure converged to RWP=12.33% and RF=4.58%. The atomic parameters have been used to analyze the phase content of mineralized white Portland clinkers. These clinkers contain Ca3SiO5, Ca2SiO4, Ca12Al14O32F2 and Ca10(SiO4)3(SO4)3F2. The agreement between the elemental composition inferred from the Rietveld phase analysis and that measured by XRF is noteworthy. This comparison does not take into account the presence of amorphous phases and unmodeled elemental substitutions in crystalline phases. Similar Rietveld studies on commercial white Portland clinkers are also shown to be feasible.
30 citations