ACI MFTT study guide
ACI MFTT · Work through your exam, one topic at a time.
The ACI Masonry Field Testing Technician (MFTT) is a certification in the Masonry Testing group of the American Concrete Institute's certification programs. ACI describes its testing programs as assessing the knowledge and ability to perform, record, and report the results of concrete field and laboratory tests; the masonry field technician credential applies that model to masonry construction. The ACI MFTT study guide has 5 sections and about 1,515 words.
01Masonry Materials, Units, Mortar, and Grout Sampling
Masonry field testing begins with knowing what is being sampled. Clay brick is specified under ASTM C216, concrete brick under C55, and concrete masonry units under C90; C140 provides the sampling and test procedures for concrete masonry units.
288 words, about 1 min02Field Testing of Masonry Mortar and Grout: Consistency, Water Content, and Strength Specimens
Field mortar testing under ASTM C780 typically includes consistency, water content, and compressive strength. Consistency may be measured by cone penetration or by flow table (ASTM C1437); these are different methods and are not interchangeable.
310 words, about 2 min03Masonry Prism Construction, Curing, and Compressive Strength Testing
ASTM C1314 covers masonry prism compressive strength. A prism is a small assemblage of masonry units and mortar constructed to represent the field wall.
308 words, about 2 min04Unit Compressive Strength and Absorption/Saturation Testing
ASTM C140 provides procedures for sampling and testing concrete masonry units, including compressive strength, absorption, moisture content, and density. Compressive strength is determined on capped units or half units, and for hollow units the load is divided by the net area, not the gross area.
306 words, about 2 min05Test Records, Reporting, and Qualification of Test Personnel
Test records are the evidence that the work was done correctly. A complete field report identifies the project, sample location, date and time, material and batch, test standard, specimen identification, curing and conditioning history, test age, equipment, results, and the name and certification of the technician.
303 words, about 2 min