Ion-beam thinned specimens of cement-forming compounds and cement pastes have been examined by transmission electron microscopy (t.e.m.). The triclinic lattice of pure tricalcium silicate has been ...

Each year, manufacturers produce around 5 billion tons of portland cement — the gray powder that mixes with water to form the “glue” that holds concrete together. That’s nearly three-quarters of a ton ...

A computer model shows tricalcium silicate with a defect known as a screw dislocation, which influences the brittle properties of the crystal structure. The atoms on the periphery are faded because ...

Portland cement is a mixture of many compounds. Among them four of these make up 90% or more of the weight of Portland cement: Tricalcium silicate (C3S), Dicalcium silicate (C2S), Tricalcium aluminate ...

A new analysis reveals how damage progresses in concrete that’s exposed to sulfate, a nearly ubiquitous compound. The work could lead to the design of concrete structures with improved durability, the ...