• Alite hydration mechanism in presence of ye’elimite related to BAY cements 

      Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (2019-10-08)
      One alternative to decrease CO2 emissions from ordinary Portland Cement (OPC) production consists on the development of a new kind of eco-cements composed by less calcite demanding phases. That is the case of ...
    • Aluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyses 

      Cuesta-Garcia, Ana Maria; Ichikawa, Rodrigo U.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; [et al.] (Elsevier, 2017-06)
      There are many commercially important multiphase materials which contain amorphous phases, such as cement pastes, porcelains, glass-ceramics or pharmaceutical compounds. However, the analysis of amorphous phase(s) within ...
    • Behavior of Belite cement blended with Calcium sulfoaluminate cement: an Ecocement 

      Londono-Zuluaga, Diana; Pineda, Juan Manuel; Gomez-de-la-Torre, Maria de los Angeles (2019-09-26)
      Belite Portland Cements (BPC) and calcium sulfoaluminate cements (CSA) are considered as environmentally friendly cements due to their lower CO2 emissions. These ecocements (BPC and CSA) emit about 0.03 and 0.18 less tons ...
    • Clinkering and early age hydration characterization of Belite-Alite Calcium Sulfoaluminate (BACSA) cements 

      Londono-Zuluaga, Diana; Álvarez-Pinazo, Gema; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; [et al.] (2015-10-26)
      In this work, four BACSA clinkers with different compositions (belite ~ 70-55 wt %, alite ~ 10-15 wt % and ye’elimite ~ 10-15 wt %) were synthesized (at laboratory scale). Lime, gypsum, kaolin and sand were used as raw ...
    • Clinkering and hydration of belite-ye'elimite-alite cement 

      Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (Elsevier, 2017)
      Some belite-ye´elimite-ferrite (BYF) cements present low mechanical strengths mainly due to the slow reactivity of belite. A solution to this problem may be the activation of BYF clinkers by preparing them with a coexistence ...
    • Clinkering of calcium sulfoaluminate clinkers: polymorphism of ye'elimite 

      Gomez-de-la-Torre, Maria de los Angeles; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; [et al.] (2018)
      The manufacture of CSA cements is more environmentally friendly than that of OPC as it releases less CO2. This reduction depends on CSA composition and is due to three factors: i) less emissions from decarbonation in the ...
    • Design and optimisation of new formulations of Belite-Alite Calcium Sulfoaluminate (BACSA) eco-cements 

      Londono-Zuluaga, Diana; Santacruz-Cruz, Maria Isabel; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles (2015-07-02)
      Belite Calcium SulfoAluminate (BCSA) eco-cements were developed as OPC substitutes since in their production release 22% less CO2 than OPC. BCSA eco-cements contain belite as main phase (>50 wt%) and ye'elimite as secondary ...
    • Eco-cements containing Belite, Alite and Ye’elimite. Hydration and mechanical properties. 

      Londono-Zuluaga, Diana (UMA Editorial, 2018)
      Cement industry is one of the major contributors for greenhouse gases emissions, releasing about one ton of carbon dioxide per ton of ordinary portland cement (OPC) fabricated. For these reasons, there is a growing interest ...
    • Hydration development and thermal performance of calcium sulphoaluminate cements containing microencapsulated phase change materials 

      Sanfelix, Susana G.; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles; [et al.] (2020-03-24)
      Microencapsulated phase change materials (MPCM) incorporated in buildings walls can reduce indoor temperature fluctuations, conserving energy and enhancing thermal comfort. MPCM were incorporated in calcium sulphoaluminate ...
    • Hydration study of alite-ye’elimite-anhydrite phases associated to BAY cement 

      Londono-Zuluaga, Diana; Tobon, J.I.; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (2017-10-18)
      An alternative to decrease CO2 emissions from OPC production consists on the development of a new kind of eco-cements composed by less calcite demanding phases, such as belite and ye'elimite. That is the case of ...
    • Hydration study of Belite-Alite Calcium Sulfoaluminate (BACSA) cement blended with fly ash 

      Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (2015-10-26)
      The main objective of this work is to understand the effect of the addition of fly ash (0, 15 and 30 wt%) in the hydration of a BACSA cement paste (water/cement=0.4) prepared with 12 wt% of anhydrite. The pastes were ...
    • In-situ Molibdenum X-ray powder diffraction study of the early hydration of cementitious systems on a humidity chamber 

      Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; León-Reina, Laura; Santacruz-Cruz, Maria Isabel; [et al.] (2016-07-06)
      The durability of cement-based construction materials depends on the environmental conditions during their service life. A further factor is the microstructure of the cement bulk, established by formation of cement hydrates. ...
    • Influence of fly ash blending on hydration and physical behavior of Belite-Alite-Ye'elimite cements 

      Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (2018-10-19)
      A cement powder, composed of belite, alite and ye’elimite, was blended with 0, 15 and 30 wt% of fly ash and the resulting lended cements were further characterized. During hydration, the presence of fly ash caused the ...
    • Multiscale understanding of tricalcium silicate hydration reactions 

      Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; [et al.] (Nature Publishing Group, 2018-06)
      Tricalcium silicate, the main constituent of Portland cement, hydrates to produce crystalline calcium hydroxide and calcium-silicate-hydrates (C-S-H) nanocrystalline gel. This hydration reaction is poorly understood at ...
    • Pair distribution function studies in cementitious systems 

      Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; [et al.] (2017-10-24)
      The analysis of amorphous/nanocrystalline phase(s) within cement matrices that contain high amounts of crystalline phase(s) is very challenging. Synchrotron techniques can be very useful to characterize such complex samples.1 ...
    • Synchrotron Radiation Pair Distribution Function Analysis of Gels in Cements 

      Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; [et al.] (MDPI, 2017)
      The analysis of atomic ordering in a nanocrystalline phase with small particle sizes, below 5 nm, is intrinsically complicated because of the lack of long-range order. Furthermore, the presence of additional crystalline ...
    • Synchrotron x-ray pair distribution function: A tool to characterize cement gels 

      Cuesta-Garcia, Ana Maria; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; [et al.] (2018-07-06)
      Cement matrices contain large amounts of crystalline phases jointly with amorphous and/or nanocrystalline phases. Consequently, their analyses are very challenging. Synchrotron powder diffraction in combination with the ...
    • Synthesis and behavior of Belite-Alite-Ye’elimite (BAY) cement 

      Londono-Zuluaga, Diana; Tobon, J.I.; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (2016-06-29)
      Ye’elimite based cements have been studied since 70’s years in China, due to the irrelevant characteristics from a hydraulic and environmental point of view. One of them is the reduced fuel consumption, related to the lower ...
    • Tailored setting times with high compressive strengths in bassanite calcium sulfoaluminate eco-cements 

      García-Maté, Marta; Londono-Zuluaga, Diana; Gomez-de-la-Torre, Maria de los Angeles; Losilla, Enrique R.; Cabeza-Diaz, Aurelio; [et al.] (Elsevier, 2016-09)
      This work deals with the hydration of a calcium sulfoaluminate (CSA) eco-cement prepared with bassanite and different additives (type and content) at a fixed water/CSA ratio of 0.5. Pastes prepared with bassanite show high ...
    • Water-to-cement ratio influence on low-carbon cements performances 

      Santacruz-Cruz, Maria Isabel; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Cuesta-Garcia, Ana Maria; García-Aranda, Miguel Ángel; [et al.] (2019)
      Portland Cement (PC) is the most important active ingredient in most of the construction concrete. However, the PC production is associated with a high carbon dioxide release (around 1 ton of CO2 per ton of PC). One approach ...