LANDU Shotcrete Additives — Boosting Strength, Adhesion & Durability

In dry‑mix systems, dry ingredients are conveyed and mixed with water at the nozzle, giving immediate control over water content on‑site. Wet‑mix shotcrete uses a pre‑blended slurry pumped to the nozzle. Wet‑mix offers smoother flow, less dust, and higher placement rates, while dry‑mix is ideal for remote or repair work. LANDU additives are formulated for both methods, ensuring stable performance regardless of equipment or environment.

Yes. LANDU PCE Flake Superplasticizer is chemically compatible with most alkali‑free and alkali‑based accelerators. It maintains workability without retarding early strength, making it suitable for tunnel linings or fast‑setting shotcrete applications. We recommend field testing to fine‑tune the dosage for each accelerator type.

Rebound occurs when sprayed material bounces off the surface before adhesion. LANDU polymers and fibers improve cohesion, particle binding, and adhesion, effectively lowering rebound by 10–25%. The result: less material waste, tighter compaction, and a denser finished layer.

A combination of LANDU PCE Superplasticizer (for better dispersion and hydration) plus a proper accelerator system yields rapid strength gain. For ultra‑fast performance (early load‑bearing or overhead applications), our experts can advise optimized formulations including defoamer and fiber adjustments.

Slightly – depending on dosage and temperature. PCE Superplasticizer may extend open time by a few minutes under cold conditions, while accelerators dominate the initial set rate in warm climates. Our R&D team can help adjust dosage ratios for desired set behavior without compromising strength.

Absolutely. A hybrid reinforcement of steel + PP fiber combines macro‑level toughness (from steel) with micro‑crack control and better cohesion (from PP fiber). This is a common specification for tunnel shotcrete and slope stabilization, where both impact resistance and surface durability are critical.

LANDU Crystalline Waterproofing Additive creates internal crystals that seal capillaries and micro‑cracks within the cement matrix. It provides permanent integral waterproofing, resisting hydrostatic pressure up to 7 bar. The sealing mechanism reactivates upon subsequent moisture exposure.

Add the Powder Defoamer directly to the dry blend before water addition to ensure uniform dispersion. Typical dosage is 0.05–0.2% by cement weight. It is especially useful with high‑speed spray equipment where entrained air causes foam and voids.

Our technical support team and laboratory experts provide:

• Mix design optimization for site materials
• Setting time and pumpability tests
• Dosage adjustment based on climate and spray equipment
• On‑site support for trial batches and quality evaluation

Each customer receives a complete technical report and recommendation for production scale‑up.

Yes. LANDU offers free evaluation samples of PCE, fibers, defoamers, and crystalline additives worldwide. OEM and private‑label solutions are available with custom packaging and dosage tailoring to regional cement chemistry. Contact our sales team to discuss bulk supply or partnership options.