On a 12-foot reinforced CMU wall the crew laid all the block, stuck the vertical bars down the cells from the top the next morning, ordered 3000 psi concrete with 3/4 aggregate at a 4-inch slump, and poured the cells full from the top in one shot with no cleanouts, shoving a 2x4 down each cell to 'settle' it.

Expect a Red Tag / Failed Inspection. You have multiple code violations (TMS 402/602 / IBC 2104) that make this wall structurally unverifiable.

Specific Failures:

1. No Cleanouts (TMS 602 Art. 3.5 B.1.b / IBC 2104.3): Required for pours > 4 ft high (your 12-ft wall is 3x that limit). You cannot verify bar placement, lap splices, cell alignment, or remove mortar droppings/slurry from the bottom course.
2. Improper Consolidation (TMS 602 Art. 3.5 B.2 / ACI 308R): A 2x4 is not a vibrator. It cannot consolidate 3/4" aggregate in a narrow cell around vertical bars. Expect massive honeycombing, voids, and zero bond to rebar.
3. Cold Joint Risk (TMS 602 Art. 3.5 B.3): Pouring 12 ft in "one shot" from the top without cleanouts means the bottom 4–6 ft likely set before the head pressure could push grout down, or the mix segregated (aggregate hung up, paste ran down).
4. Grout Spec Issues: 3/4" aggregate is too large for standard CMU cells (TMS 602 Table 2, Note 2: max agg = 1/3 cell width, typically 3/8" or 1/2" pea gravel). 4" slump is low for high-lift grout without vibration (should be 8–11" for self-consolidating or pumped high-lift).

What the Inspector Will Do:

• Check for cleanout openings (missing).
• Tap cells with a hammer (hollow sound = voids).
• Check rebar projection/alignment at top (likely displaced by 2x4 "shoving").
• Fail the wall.

Remediation (Expensive):

1. Core drill every cell at bottom course to prove fill/bond (destructive testing).
2. If voids found: Demo and rebuild. Grout cannot be "topped off" after initial set.
3. If by miracle cores are solid: Engineer must stamp a variance letter accepting the non-standard method (unlikely for 12-ft lift).

Do not cover this wall. Call your mason contractor and structural engineer now.

This approach violates multiple code requirements and will likely result in inspection failure or rejection.

Key Issues:

1. No Cleanouts (TMS 402/ACI 530 §1.8.4.2): Grouted cells in reinforced masonry require cleanouts at the bottom of each pour height to remove debris and ensure proper bond and consolidation. Pouring full height from the top without cleanouts traps mortar fins, debris, and air voids, preventing proper grout-to-bar and grout-to-masonry bond. This is a direct code violation.

1. Improper Consolidation (TMS 402 §1.8.4.3): Shoving a 2x4 down each cell is not an approved method of consolidation. Grout must be consolidated by mechanical vibration (e.g., puddler) or rodding as it is placed, in lifts not exceeding 12–18 inches (depending on slump), to eliminate voids and ensure full encasement of reinforcement. A single top-down pour with rod probing does not achieve this, especially with 4-inch slump grout (which is stiff for grout — typically 8–11 inch slump is required for pumpability and flow).

1. Grout Slump Too Low (TMS 602/ACI 530.1 §2.6B): Grout for masonry should have a slump of 8–11 inches to flow freely around bars and fill cells. 3000 psi concrete at 4-inch slump is too stiff — it will not flow adequately, leading to voids, honeycombing, and incomplete encapsulation of vertical bars. This compromises structural integrity and bond strength.

1. Risk of Bar Displacement: Pouring stiff grout from the top can displace or tilt vertical bars, reducing effective cover and development length.

Likely Outcome: The inspector will likely reject the grout pour due to lack of cleanouts, improper consolidation, and suspect grout properties. They may require coring to verify grout placement and bar position. If voids or poor bond are found, the wall may need to be demolished and rebuilt.

Corrective Action (if time allows): Stop work. Notify the engineer. Proper grout placement requires:

• Cleanouts at base of each pour lift
• Grout slump 8–11 inches
• Placement in lifts ≤18 inches, consolidated by vibration or rodding
• Final top-off after initial set

Do not proceed with inspection as-is. This is not a minor issue — it’s a structural concern. (References: TMS 402-22, TMS 602-22)