Results 101 to 110 of about 4,892 (215)

Characterization of two calcium aluminate cement pastes

, 2021
Este capítulo examina la caracterización de cementos de aluminato de calcio (CAC) con 52% en peso y 71% en peso de contenido de alúmina. Las muestras de pasta de cemento se fabricaron en proporciones de agua a cemento de 0,4 y 0,5 (a / c). La microestructura tanto de los polvos de cemento crudo como de sus correspondientes muestras se caracterizaron ...
ZAPATA MESA, JOHN FERNANDO, COLORADO, HENRY ALONSO, GOMEZ BOTERO, MARYORY ASTRID   +2 more
openaire   +1 more source

The corrosion rate and microstructure of Portland cement and calcium aluminate cement-based concrete mixtures in outfall sewers: A comparative study

This paper presents a comparative study on the corrosion rate and microstructural characteristics of Portland cement (PC) and calcium aluminate cement (CAC)-based concrete mixtures subjected to microbially-induced sulphuric acid (biogenic H2SO4) attack ...
Kiliswa, Moses W., Alexander, Mark G., Scrivener, Karen L.   +2 more
core   +1 more source

Microstructure development in mixes of calcium aluminate cement with silica fume or fly ash

, 2009
The most widely identified degradation process suffered by calcium aluminate cement (CAC) is the so-called conversion of hexagonal calcium aluminate hydrate to cubic form.
L. Fernández, Hidalgo López, Ana, J. García, Alonso, M. Cruz, Andrade Perdrix, Carmen, Fernández, Lorenzo, Ana Hidalgo, Carmen Andrade, García Calvo, José Luis, Ma. Alonso   +9 more
core   +1 more source

Research on the Mechanical Properties of Composite Grouting Materials Based on Ordinary Portland–Sulphoaluminate Cement

Buildings
This study aimed to enhance the mechanical properties of calcium sulfoaluminate cement grouting materials (HCSA) by investigating the effects of ordinary Portland cement (OPC) content, the ratio of quicklime to gypsum, and the dosage of sodium aluminate ...
Zhenhua Wang, Wei Lan, Zhiwen Jia, Manqing Lin, Dongwei Li   +4 more
doaj   +1 more source

The kinetics of ettringite formation and dilatation in a blended cement with beta-hemihydrate and anhydrite as calcium sulfate

, 2005
The phase formation, heat of hydration and dilatation in a blended cement consisting of 50 wt.% calcium aluminate cement, 25 wt.% Portland cement and 25 wt.% calcium sulfate were studied (w/c= 1).
Evju, C, Hansen, Staffan,, Lund University.   +2 more
core   +1 more source

Calcium aluminate hydrates - laboratory preparation and characterisation

, 2008
Calcium aluminate phases are important parts of Ordinary Portland cement and Alumina cement. Various calcium aluminate hydrates originate during the hydration of calcium alumina phases. Their origin depends on the conditions of hydration.
Koplík, Jan
core  

Sapropelic modifying additives for cement bonding agents

Вестник СибАДИ, 2017
The data on obtaining active mineral additives from sapropelic raw materials while their burning at 850 … 900оС and afterpowdering are presented in the article.
V. A. Khomich, O. I. Krivonos
doaj   +1 more source

Effects of Sodium Tripolyphosphate Addition on the Dispersion and Hydration of Pure Calcium Aluminate Cement. [PDF]

Materials (Basel), 2023
Cheng B, Feng H, Armia E, Guo H, Zhang S, Zhang H.   +5 more
europepmc   +1 more source

The Hydration and Calcination Mechanism of Calcium Aluminate-Based Ultra-High Strength Cement with Calcium Sulphoaluminate Compound

, 1989
The hardening shrinkage of calcium aluminate based ultra-high strength cement becomes nearly zero by using calcium sulphoaluminate compound, and very high bending strength can be obtained by calcinating at 300°-600°C.
Etsuo Sakai, Masaki Daimon, Iwao Mino, Asaaki Nishioka   +3 more
core   +1 more source

Physicochemical properties of a calcium aluminate cement containing nanoparticles of zinc oxide. [PDF]

Restor Dent Endod, 2023
da Rosa AF, Amaral TS, Paz Dotto ME, Goulart TS, Rossetto HL, Bortoluzzi EA, Teixeira CDS, Garcia LDFR.   +7 more
europepmc   +1 more source