General
Concrete is a heterogeneous mix prepared namely by
Cement and / or Cementitious materials
Fine and Coarse Aggregate
Water
Chemical Admixtures
Other Additives (as per requirement of concrete types)
Concrete mix gets homogeneity as the size of coarse aggregates decreases. Ultra-high-Performance concrete is Concrete is more homogeneous.
(The UHPC can be used for structural and architectural members, overlays, and many more items through its factory and insitu production. The UHPC is more homogeneous and its design, mixing placing and curing processes are slightly different and need better controls in all stages from design to placement.)
This write up provides references about the Cement and / or Cementitious materials as regards to:
Characteristics
Testing requirements
Test method
The information provided in the table is in reference to updated IS Codes of Bureau of Indian Standards (BIS) and can be used by Client and Construction agency (CA).It is suggested to update the tabular contents in reference to further updates of relevant IS codes.
Cementing materials – Cementitious and Supplementary Cementitious Materials (SCM)
SCM are use in UHPC as they are of very fine size. The size is measured in Nano meter and micrometer. Also, the sand contents are limited to, < 1.0 mm. UHPC constituents’ size are based on the following doctrine as per best available research on this topic.
Pozzolanic materials conforming to relevant Indian Standards may be used with the permission of the engineer-in-charge, provided uniform blending with cement is ensured.
Ordinary Portland Cement (OPC)
Ordinary Portland Cement – As per IS 269: 2015 Specification for Ordinary Portland Cement (sixth revision) There are five grades of cement and are in the same code. S stands for sleeper grade cement, The Grades are:- G 33, G 43, G 43 S, G 53, G 53 S.