Two recently developed software programs help contractors to evaluate mix submittals and to answer two questions:
- Does the mix meet engineering and construction needs?
- Is it the most economical mix?
With these programs, contractors can better communicate with their engineers and concrete producers to ensure that all needs are met. One program enables the contractor to easily see if the recommended mix proportions will result in pumpable concrete, concrete that will produce smooth formed surfaces, or concrete that is easily finished. The other program is used to analyze test results.
MIX MANAGEMENT BY COMPUTER
The program allows users to analyze effects of aggregate gradation and total mortar fraction on the workability, pumpability, and finishability of concrete before making any trial batches. In a series of tables and charts, the program displays:
- The amount of mortar (fine sand plus cement paste) in the mix.
- A graph that allows the user to tell at a glance if the mix is too sandy or too rocky.
- A particle distribution chart that shows the percent of the total aggregate and of the total mixture that is retained on each sieve.
PROGRAM FOR STATISTICAL ANALYSIS OF TEST DATA
The statistics software was developed to help users analyze field test data. After entering field data into the computer, the user can ask the program to examine possible correlations among placing temperature, concrete temperature, air content, slump, compressive strength, flexural strength, and other variables.