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Callahan Supply is focused on customer satisfaction and excellent service!

Materials

Sack Mix                            PSI Mix
 4.0 Sack                                    2000 PSI 
 4.5 Sack                                    2500 PSI
 5.0 Sack                                    3000 PSI
 5.5 Sack                                    3500 PSI
 6.0 Sack                                    4000 PSI 
                                                        4500 PSI
                                                        5000 PSI
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Grout

Aggregates

Sand
2-NS Sand Fine
2-NS Sand Coarse 

Natural Stone
3/8" - 3" available
23-A Road Gravel 
25-A
31-D P Stone 
6-A Reg
Ag-Lime
22-A
​21-A

What composes concrete?
Concrete is a mixture of paste and aggregates (sand & rock). The paste, composed of cement and water, coats the surface of the aggregates and binds them together into a rock-like mass known as concrete. Aggregates account for 60 to 75 percent of the total volume of concrete and are divided into fine and coarse categories. The type and size of the aggregate mixture depends on the thickness and purpose of the final concrete product.