Ordinary Portland cement mortar
Ordinary Portland cement mortar, commonly known as OPC mortar or just cement mortar, is created by mixing powdered Ordinary Portland Cement, fine aggregate and water.
The advantages of Portland cement is that it sets hard and quickly, allowing a faster pace of construction. Furthermore, fewer skilled workers are required in building a structure with Portland cement.
|Ordinary Portland||M-S-N-O-K mortar||OPC mortar|
M, S, N, O, and K. Type mortar
In the United States and other countries, five standard types of mortar (available as dry pre-mixed products) are generally used for both new construction and repair. Strengths of mortar change based on the ratio of cement, lime, and sand used in mortar. The ingredients and the mix ratio for each type of mortars are specified under the ASTM standards. These premixed mortar products are designated by one of the five letters, M, S, N, O, and K. Type M mortar is the strongest, and Type K the weakest.
Cement Mortar Strength in different Ages (GB175-2007) MPa
|3 days||28 days||3 days||28 days|
|42.5||≥ 17.0 MPa||≥ 42.5 MPa||≥ 3.5 MPa||≥ 6.5 MPa|
|42.5R||≥ 22.0 MPa||≥ 42.5 MPa||≥ 4.0 MPa||≥ 6.5 MPa|
|52.5||≥ 23.0 MPa||≥ 52.5 MPa||≥ 4.0 MPa||≥ 7.0 MPa|
|52.5R||≥ 27.0 MPa||≥ 52.5 MPa||≥ 5.0 MPa||≥ 7.0 MPa|
Polymer cement mortar
Polymer cement mortars (PCM) are the materials which are made by partially replacing the cement hydrate binders of conventional cement mortar with polymers. The polymeric admixtures include latexes or emulsions, redispersible polymer powders, water-soluble polymers, liquid thermoset resins and monomers. It has low permeability, and it reduces the incidence of drying shrinkage cracking, mainly designed for repairing concrete structures.
|Cement mortar concrete||Polymer cement mortar||Cement mortar adhesive|
Lightwall is a kind of lightweight aggregate concrete panels, using expanded polystyrene foam and cement mortar instead of completely cement concrete, to increase the sound insulation and heat insulation, decrease the density and weight, as well as a few strength. The panels formed in sheet with size 2270mm * 610mm and various thickness, such as 60mm, 75mm, 90mm, 100mm, 120mm, and 150mm. This new sandwich concrete realizes one person can carry one piece easily while transport and installation, largely protect the labor force, save transport cost, installation cost and shorten the construction period.
Also all the panels are connected by cement mortar, which is the same formula with the panel inside, this make sure the panels can connect with each other firmly, just like a complete piece, as well as the connection with structures.
|expanded polystyren foam and cement mortar interlock connection||lightweight aggregate concrete panels connected by cement mortar|