Manufacturer & R&D — Xuzhou, China Trial samples from 25 kg sales@hanwangyijia.com
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YJ Hanwang Yijia New Materials
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Two Strengths · Two Fasts

Rapid-hardening performance from ordinary Portland cement

YJ series cement modifiers give you controlled fast setting, rapid hardening and high early strength on standard 42.5 / 52.5 OPC —no sulphoaluminate cement in the formulation. Built for precast plants, repair-mortar producers and rapid-repair contractors.

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Independent R&D · Own production · Mix-design support for your cement source

Hero imagePrecast yard / plant shot, 1200×800
9 minInitial set, YJ-51YYLX (spec ≤ 15 min)
30 MPa24 h compressive strength (spec ≥ 25 MPa)
20 min —2 hAdjustable demoulding window
C60+Repair mortar grade with YJ-K308
1

A narrow specialism

We work on four things only: cement early strength, strengthening, fast setting and fast hardening —the "two strengths, two fasts".

2

Our own R&D bench

Senior technical staff drawn from Chinese research institutes and universities, with mature processes behind every YJ product.

3

Formulation service, not just supply

Your cement source, aggregate and climate decide the dosage. We run the trial mixes and hand you a working recipe.

Product range

Four families of building-chemical additives

Powder admixtures for cement and gypsum dry-mix systems, supplied in 25 kg bags and 1000 kg bulk bags.

Cement strengtheners

Raise compressive and flexural strength, or hold the grade while cutting cement content.

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Cement enhancers

Controlled fast set and rapid hardening on ordinary Portland cement, tunable by dosage.

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Rapid hardeners

Fast demoulding and fast traffic opening for precast, repair mortar and leak sealing.

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Gypsum additives

Set control and strength development for gypsum-based dry-mix products.

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Featured

Two products doing the heavy lifting

Both replace expensive special cements with a dosed additive on standard OPC.

Product photoPowder in bag / open sample, 900×600
YJ-51YYLX

Rapid-Hardening Cement Enhancer

Replaces special rapid-hardening cement outright. Breaks the induction dormancy of tricalcium silicate to build C-S-H and ettringite fast, so precast plants can pull moulds in 20 minutes to 2 hours instead of waiting a day.

Initial set 9 min 24 h · 30 MPa Dosage 8–25% No strength retrogression
Full specification
Product photoRoad repair application, 900×600
YJ-K308

Rapid Repair Mortar Admixture

A single admixture for producing rapid repair mortar. Blend it with 42.5 PO / 52.5 OPC and clean sand —no sulphoaluminate cement, no cocktail of separate admixtures. Foot traffic at 1 hour, vehicles at 2 hours.

Foot traffic 1 h Traffic open 2 h C60+ achievable Micro-expansive
Full specification
Applications

Where hardening speed decides your output

Anywhere mould turnover, traffic opening or shift time is the bottleneck.

Application photoPC precast plant

PC precast components

Shorten the demoulding cycle and raise bed turnover without a steam curing line.

Application photoArt / decorative cement

Art & decorative cement

Fine detail products demould early and keep dimensional stability as they cure.

Application photoLeak sealing

Emergency leak sealing

Set in minutes against running water, then keep gaining strength instead of falling back.

Application photoRoad repair

Road & pavement repair

Patch overnight and reopen to traffic in 2 hours with YJ-K308 repair mortar.

Application photoIndustrial floor

Industrial floor repair

Hand the plant floor back inside one maintenance window, at C60-class strength.

Application photoDry-mix plant

Dry-mix mortar production

Drop-in additive for producers building their own rapid-set product lines.

Why specifiers choose YJ

Fast, but not at the cost of durability

Plenty of accelerators buy you early strength and quietly give it back later. The YJ chemistry co-hydrates with the cement system, so the strength curve keeps climbing.

  • No strength retrogression. Early strength builds fast and late strength keeps rising —no fall-back.
  • Carbonation resistance. Suppresses carbonation, extending service life of the finished product.
  • Micro-expansive. Controlled expansion offsets shrinkage cracking in mortars and cast products.
  • Simpler supply chain. Standard OPC replaces costly special rapid-hardening cement.
  • Tunable by dosage. Set time, early strength and demould window move with the dose rate.
  • Lower total cost. Fewer raw materials, fewer trials, less mis-batching risk.
Comparison visualStrength-development curve: YJ vs sulphoaluminate system, 800×1000
Test data

YJ-51YYLX laboratory results

Specification versus measured values from our own laboratory testing.

Test itemSpecificationMeasured result
AppearanceOff-white powderOff-white powder —pass
pH value> 1010.5
Initial setting time≤ 15 min9 min
Final setting time≤ 2 h30 min
Compressive strength, 24 h≥ 25 MPa30 MPa
Flexural strength, 24 h≥ 5 MPa5.5 MPa
Bond strength≥ 1.5 MPa1.8 MPa

Laboratory data. Real-world performance shifts with cement brand, aggregate and ambient temperature — a trial mix with your own materials is required before scale-up.

Technical support

How we get you to a working recipe

Dosage is not a number off a datasheet. It depends on your cement, your sand and your workshop temperature.

Tell us the target

Cement grade and brand, aggregate, required set time, demould window, target strength, ambient temperature.

Lab mix design

We run trial mixes on your parameters and come back with a dosage and a mix proportion.

Sample & plant trial

A 25 kg sample so you can verify set time, strength and workability on your own line.

Scale-up support

Dose adjustment for seasonal temperature swings and ongoing supply in 25 kg or 1000 kg packaging.

Get in touch

Request a technical data sheet and a trial sample

Tell us the application and the cement you are running. You get the TDS, a suggested dosage and pricing for trial quantities.

  • Reply from a technical contact, not a form letter
  • 25 kg trial sample available
  • Packaging: 25 kg bags / 1000 kg bulk bags
  • OEM and private-label production supported

Xuzhou Hanwang Yijia New Materials Co., Ltd.
Xuzhou, Jiangsu, China
sales@hanwangyijia.com

Product Inquiry
Company photoPlant exterior or production line, 900×1000
About us

Xuzhou Hanwang Yijia New Materials Co., Ltd.

We are a technology-driven manufacturer combining R&D, production and sales of building chemicals. Our range covers cement strengtheners, cement enhancers, cement rapid hardeners and gypsum additives, and we act as a technical service partner in those fields rather than a catalogue supplier.

Our technical team brings together senior specialists and professors from Chinese research institutes and universities. That bench is what lets us serve well-known producers in the industry and support dry-mix mortar manufacturers through development and production alike.

More about the company

Not sure which product fits your line?

Send us your cement grade and what you are casting. We will tell you which YJ product applies —or tell you if none of them do.