Retarders & Accelerators

Early-Strength Agent for Cement

A high-efficiency composite early-strength agent compatible with Portland, ordinary Portland and slag Portland cements. By optimizing the hydration process it raises 1-day strength by 30%-50% and brings 3-day strength to over 60% of design strength, shortening curing cycles in normal- and low-temperature concrete works.

APPLICATIONS

Application scenarios

01Concrete construction at normal and low temperatures with tight schedules
02Precast and cast-in-place elements requiring early demolding
03Low-temperature (30 °C) and medium-temperature (52 °C) cement slurry acceleration

PERFORMANCE

Performance indicators

Table 1 — Physical & Chemical Requirements for Cement Early-Strength Agent
Item	Specification
Appearance	Powder or Granules
Moisture Content % ≤	5.0
Fineness (Residue on 0.84 mm Sieve) ,% ≤	4.0

Table 2 — Performance Requirements for Cement Slurry and Set Cement with Low-Temperature (30 °C) Early-Strength Agent
Item	Specification
Free Fluid % ≤	1.0
Compressive Strength MPa ≥	3.5

Table 3 — Performance Requirements for Cement Slurry and Set Cement with Medium-Temperature (52 °C) Early-Strength Agent
Item	Specification
Free Fluid % ≤	1.0
Initial Consistency Bc ≤	30
Thickening Time Reduction Rate % ≤	25
Compressive Strength Ratio ≥	1.35

USAGE

Usage

Liquid form, easy to meter and dose directly into the mix water; typical dosage is 1.0%-3.0% by weight of cement. Compatible with water reducers and retarders without changing normal construction practice.

PACKAGING

Packaging & delivery

Ship as non-hazardous goods per standard chemical practice; protect from impact, leakage, direct sunlight and freezing during transport.

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Early-Strength Agent for Cement

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