Engineer Concrete case studies
Engineer Concrete · Put your knowledge to work in context.
The Engineer Concrete credential is a professional-level qualification for civil and structural engineers who design, specify, and supervise reinforced and prestressed concrete work. It suits engineers moving from general practice into concrete-focused roles, and it is also taken by materials engineers, QA/QC leads, and senior site engineers who need design-level judgement rather than code-lookup familiarity. The Engineer Concrete case studies are 5 cases and about 3,823 words.
1Sand Moisture Probe Under-Reads: Tracing a 28-Day Strength Failure
A ready-mix plant supplied concrete for a 300 mm thick suspended two-way slab specified at 40 MPa. The approved mix contains 380 kg/m³ of portland cement, w/c = 0.44, 720 kg/m³ of fine aggregate, 1080 kg/m³ of coarse aggregate and 167 kg/m³ of water, with a water-reducing retarder.
759 words, about 4 min2Voids Under a Congested Transfer Beam Bar Layer
A 1200 mm deep × 800 mm wide transfer beam spans 11 m clear and is reinforced with three layers of eight #36 bars at the bottom, #13 stirrups at 100 mm, and 40 mm cover; clear gaps between bars are about 60 mm and between layers about 55 mm. The approved mix uses 20 mm coarse aggregate, 140 mm slump, w/c 0.42 and 30% slag, pumped through a 125 mm line at 1.6 m³/min.
799 words, about 4 min3Hot-Weather Slab: Plastic Cracking, Late Saw-Cuts and a Dusty Surface
An exterior slab-on-grade, 150 mm thick, is placed as 5 m × 5 m panels with saw-cut contraction joints. Ambient temperature is 34 °C, relative humidity 28%, wind 24 km/h, and the concrete arrives at 31 °C with w/c 0.48 and 25% fly ash.
764 words, about 4 min4Five Low Strength Tests on 35 MPa Columns: Validity and Core Route
The columns of a 12-storey frame are specified as 35 MPa concrete. Five strength tests, each the average of two 150 × 300 mm cylinders, returned 37.1, 34.1, 32.3, 35.3 and 30.6 MPa at 28 days.
710 words, about 4 min5Grade 500 Bar Substitution in a 7.5 m Transfer Beam
A simply supported transfer beam spans 7.5 m with b = 350 mm, h = 650 mm, effective depth 590 mm and f'c = 28 MPa. The design uses 4-#25 bottom bars (fy = 420 MPa, 510 mm² each) and #10 two-legged stirrups at 300 mm; analysis gives Mu = 380 kN·m and Vu = 210 kN at the critical section.
791 words, about 4 min