Tips On Ready Mix Concrete

Call 1 671 734-2971 thru 8 ext 407

TIPS ON READY MIX CONCRETE
Ordering concrete is easy, even if you are a first time caller. Our engineers/sales staff are trained to guide you every step of the way. Here are a few important tips to remember:

 

STRENGTH:
One of the most important factors before ordering ready mix concrete is knowing what will be the required compressive strength.


Typically reinforced concrete ranging between 3,500 to 4,000 psi is used on footing and slabs on grade; between 3,500 to 5,000 psi on suspended slabs, beams and girders; walls and columns normally required between 3,000 to 5,000 psi. When non-reinforced concrete is used then different strengths will be required. If you are using it on footings and walls a concrete strength of 2,500 psi could be enough, and between 4,000 to 5,000 for pavements. Outdoor concrete used on home improvements should be ordered with a strength ranging between 3,500 to 4,500 psi.

 

READY MIX CONCRETE AGGREGATE SIZE:
The maximum coarse aggregate must also be specified when ordering ready mix concrete. If you use larger coarse aggregate in a cross section where the steel ratio is high, then you should be creating a bug hole problem. The maximum size coarse aggregate ordered must be determined by the American Concrete Institute Standard (ACI) and depends on the spacing of reinforcing steel, inside form dimensions and available aggregates.

Maximum aggregate shall not exceed 1/5 the narrowest inside form dimension and shall not be greater than ¾ the spacing between re-bars.

 

READY MIX CONCRETE SLUMP:
Determine the best slump. Slump is the consistency of the concrete when it’s being placed. Slump shall be specified low although it will vary depending on reinforcement spacing, formwork type and the slope or the place where it will be placed. Slumps are also determined by ACI standards although we can recommend the following:
Reinforced foundation wall and footings: 2 minimum 5 maximum
Footings, caissons: 1 minimum, 4 maximum
Slabs, beams, building columns and reinforced walls: 3 minimum and 6 maximum
Pavements: 2 minimum and 3 maximum
Heavy Mass Concrete: 1 minimum and 3 maximum

ORDERING READY MIX CONCRETE
1. Have your measurements ready. When you call, it is always helpful to know the kind of job that you are pouring and the size of the pour. You will be asked for the length, width, and thickness of the area you wish to pour. Concrete is ordered in cubic yards. The typical truck could deliver between 9 to 11 cubic yards maximum capacity although less amounts could also be ordered. Always allow for some wasted concrete that will normally vary between 5 to 10 percent additional concrete. (see our concrete calculator)

2. Inform the engineer/sales/dispatcher the conditions of where the ready mix will be placed (slope, incline roof, limited space, basement, roof), or any relevant information that could affect the progress of the pour.

3. Have the physical address of the delivery location. Timely deliveries are the key to our business. We appreciate all the information that you can provide to guarantee excellent service.

Call 1 671 734-2971 thru 8 ext 407