Hunan Luzhi New Material Technology Co., Ltd.

LZ-J1 Prestressed Duct Grouting Agent

The LZ-J1 prestressed duct grouting agent uses a polycarboxylate powder-based water reducer as a fluidizing agent, and is simultaneously formulated with functional materials such as plasticizing agents, expansion components for both the setting and hardening stages, defoamers, and flocculants. It offers multiple benefits, including fluidization, strength enhancement, workability retention, micro-expansion, and excellent non-segregation properties.

Category:

Concrete admixture materials

Product accessories:

Product Description

Product Introduction

The LZ-J1 prestressed duct grouting agent uses a polycarboxylate powder-based water reducer as a fluidizing agent, combined with composite materials that provide functions such as plasticity enhancement, controlled expansion during the hardening phase, anti-foaming, and flocculation. This unique formulation delivers multiple benefits, including fluidization, strength reinforcement, workability retention, micro-expansion, and zero-segregation properties.

Product Advantages

1. Exhibits excellent flowability at lower water-to-cement ratios, with no bleeding.

2. Possesses suitable expansion properties to compensate for slurry shrinkage, ensuring the slurry tightly fills the prestressing ducts and effectively protects the steel strands while efficiently transferring loads.

Parameter metrics

Serial Number	Project		Standard indicators	Detection value	Judgment result
1	Coagulation time, h	Initial setting	≥5	6 to 10	Qualified
1	Coagulation time, h	Final setting	≤24	8–14	Qualified
2	Flowability, s	Initial Flowability	10–17	14–17	Qualified
		30-minute fluidity	10–20	15–20	Qualified
		60-minute fluidity	10–25	18–25	Qualified
3	Water Separation Rate, %	3-hour capillary water absorption rate	0	0	Qualified
3	Water Separation Rate, %	24-hour free water separation rate	0	0	Qualified
4	Flexural strength, MPa	3d	≥5.0	≥6.0	Qualified
		7d	≥6.0	≥7.0	Qualified
		28d	≥10.0	≥11.0	Qualified
5	Compressive strength, MPa	3d	≥20.0	≥25.0	Qualified
		7d	≥40.0	≥50.0	Qualified
		28d	≥50.0	≥60.0	Qualified
6	Free expansion rate, %	3h	0 to 2	0.1 to 0.5	Qualified
6	Free expansion rate, %	24h	0–3	0.1 to 0.6	Qualified
7	Water Pressure Bleeding Rate, %	0.22 MPa, 5 min	≤2.0	1.0–2.0	Qualified
7	Water Pressure Bleeding Rate, %	0.36 MPa, 5 min	≤2.0	1.0–2.0	Qualified
8	Fill Level		Qualified	Qualified	Qualified
9	On the effect of steel reinforcement corrosion		Rust-free	Rust-free	Qualified