Design Example 2 Design the concrete for an unreinforced, air-entrained pavement, in a very cold climate where there is no statistical data available for the proposed mix design; 25 cm thick; specified 28-day concrete flexural strength of 4.7 MPa; the coarse aggregates have a bulk specific gravity of 2.70; a rodded density of 1650 kg/m3 at the

Understand concrete mix design submittal and approval process for NCDOT Know how to correctly complete NCDOT mix design forms ... Example 4 Determine w/c given a mix design with 32 gallons of water and 517 Lbs of cement per yd. Answer: Water weight = …

Mix Design Example Coarse aggregate = subangular crushed stone Nominal maximum aggregate size = 3/4" Design strength = 4500 psi Specified slump = 1-2" Coarse Fine Aggregate Aggregate Unit weight (lb/ft3) = 101 106 Bulk specific gravity (dry) = 2.574 2.548 Bulk specific gravity (SSD) = 2.623 2.592 Apparent specific gravity = 2.705 2.664

Class ACI Mix Design Example Step 4. Estimation of mixing water and air content. From Table 2, the recommended air content is 1.5%; the water requirement is 325 lb./yd.3. 325 1.5% Class ACI Mix Design Example Step 5. Water/cement ratio. From Table3, the estimate for required w/c ratio to give a 28-day strength of 4,000 lb./in.2 is 0.57.

Mix design Page 3 Table 2. Approximate compressive strengths (N/mm2) of concrete mixes made with a free-water/cement ratio of 0.5 Cement Strength Class 3 Type of Coarse aggregate Compressive strengths (N/mm2) (age in days) 7 28 91 42.5 Uncrushed 22 30 42 49 Crushed 27 36 49 56 52.5 Uncrushed 29 37 48 54 Crushed 34 43 55 61

9.3 Modifications to the mix design method 31 9.4 Example of mix design 32 9.5 Use of Portland pulverised-fuel ash cement 33 10 Design of Portland cement/ggbs mixes 36 10.1 Introduction to ground granulated blastfurnace slag (ggbs) 36 10.2 Information on Portland cement/ggbs concrete 36 10.3 Advice on methods of mix design for Portland cement ...

Aci Mix Design Example 1 - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online. This document provides a step-by-step example of designing a concrete mix using the ACI method. The key steps are: 1) The specifications require a 35 MPa compressive strength concrete with 50 mm slump. 2) Calculations are done to determine the water content, cement …

ACI concrete mix design example - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document provides an example of designing a concrete mix using the ACI method. The target is a 4000 psi compressive strength concrete with 3 inch slump and 3/8 inch maximum aggregate size. It lists the materials properties and steps to calculate the cement, …

Class ACI Mix Design Example Step 6. Calculation of cement content. Based on steps 4 and 5, the required cement content is: 1,030lb./yd.3 340 lb./yd.3 0.33 weight of cement Class ACI Mix Design Example Step 7. Estimation of coarse aggregate content. Interpolating Table 4 for the fineness modulus of the fine aggregate of 2.70 Fineness Modulus

The following is a design guide for selecting proportions for initial concrete mix design for normal weight concrete. This guide references ACI 211.1-91 (Reapproved 2009), “Standard Practice for Selecting Proportions for Normal, Heavy weight, and Mass Concrete”, specifically Chapter 6, “Procedure” and Appendix 1, “Metric (SI) System