WHDF Concrete Inorganic Nanometer Anti-crack and Infiltration-reducing Agent（WHDF ）-WUHAN TIANYI NEW MATERIAL.CO.,LTD

: WHDF Concrete Inorganic Nanometer Anti-crack and Infiltration-reducing Agent（WHDF ）

The name of this product is WHDF Concrete Inorganic Nanometer Anti-crack and Infiltration-reducing Agent. It is also known as WHDF Concrete Reinforcing and Compacting(Anti-crack)Agent. WHDF is short for WHDF Concrete Inorganic Nanometer Anti-crack and Infiltration-reducing Agent. This product is a milky white(yellow)liquid.
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Product Features
Scope of Application
Construction Requirements
Specification
Storage, Transportation & Package
Cautions
Engineering Cases

Under the combined action of Nano Dispersant, Aluminum-calcium Inhibitor, Crystalline Activator and Active Activator, the working performance of fresh concrete and the mechanical property and deformation property of hardened concrete can be effectively improved , and the crack-resistance, compactness and durability of concrete can be greatly improved.

1.Crack-resistance Property: After adding WHDF, the compressive strength of concrete is increased by 5-10%; the tensile strength is increased by 15-25%; the ultimate tensile value is increased by 15-20%, the maximum peak time of early hydration heat can be delayed by more than 24hrs, and the early dry shrinkage value can be reduced by more than 30%. It shows that the crack-resistance property of concrete is significantly improved.

2.Compactness Property: After adding WHDF(2% of the cementitious materials), the impermeability grade of concrete is≥P12, the mercury intrusion porosimetry(MIP)shows that the total porosity of concrete decreases by 8%, the number of freezing and thawing cycles can reach more than 300 times, the concrete is resistant to acid, alkali and chloride ion erosion, and the electric flux is reduced by more than 20%. The result shows that WHDF can improve the compactness property (impermeability) of concrete.

3.Durability Property: Durability property mainly depends on the crack-resistance, impermeability and stability of concrete. For the stability of concrete, WHDF can promote the participation of active mixtures that affect the stability performance to participate in the corresponding reaction and generate the required gel and stable nanoscale minerals while avoiding harmful displacement reactions. In this way it can improve the corrosion resistance of concrete

4.Working Property: After adding WHDF, the gel in the concrete system increases, the gel chain increases and the density increases, the plastic viscosity of concrete mixture increases accordingly, the bond stress of the slurry to the aggregate increases, the water retention and the slump retention performance are good, the bleeding of the mixture is moderate, and there is no segregation, the fluidity is good and the slump loss is reduced by more than 30%,which ensures the pumping in the construction.

It is suitable for all the construction projects with high crack-resistance and waterproofing requirements for the concrete, including but not limited to the following projects:

1.The crack-resistance and waterproofing concrete in dams and underground construction facilities of Hydraulic and Hydropower Engineering .

2.The crack-resistance and waterproofing concrete in Military & Nuclear Underground Engineering.

3.The crack-resistance and waterproofing concrete in Transport Construction Engineering such as roads, railways, bridges, wharves, subways and tunnels under the sea.

4.The crack-resistance and waterproofing concrete in Municipal Engineering such as tap water and sewage treatment projects.

5.The crack-resistance and waterproofing concrete in Civil Construction Engineering such as basements, kitchens, bathrooms and cast-in-place of roof.

The recommended WHDF amount is 2% of cementitious material dosage, and the specific amount should be determined according to the actual requirements of the project.

The construction requirements of anti-cracking and waterproofing concrete with WHDF are as follows :

1.Keep the formwork and bedding clean and wet.

2.Check the concrete materials delivery list and the concrete mix ratio. Confirm the concrete strength grade. Check the concrete transportation time. Determine the concrete slump and measure the concrete extension if necessary , and then carry out concrete pouring after all the confirmation.

3.It is better to carry out the continuous pouring of concrete at one time; When continuous pouring is not available at one time, the interval time should not exceed 1.5 hours.

4.The process of pouring the concrete should be carried out layers by layers, which should meet the specified requirements for the vibration thickness, and the upper concrete should be poured before the initial setting of the lower concrete.

5.Concrete vibrating should be able to make the concrete in all parts of the formwork dense and uniform. There should be no incomplete vibration, undervibration, overvibration, and slurry leakage in order to avoid the honeycomb.

6.The maintenance should be carried out as soon as possible after the pouring is done, and the maintenance period should not be less than 14 days.

Table 1. Physical Properties

Items	Index
Chlorine ion , %	≤0.02
Total alkali, %	≤3.00
Density(20℃), g/ml	1.08±0.02
PH value	3.00±1.00
Insoluble substance, %	≤3.00

Table 2. The Property of Concrete with WHDF

Items		Index
Ratio of bleeding rate, % ≤		80
Air, % ≤		2.0
Difference in setting time, min	Initial set	﹣90 ~ ＋120
	Final set
Compressive strength % ≥	3d	100
	7d	110
	28d	110
Ultimate tensile value % ≥	28d	115
Shrinkage ratio, % ≤	28d	100
Penetration height ratio，％ ≤		30
Electric flux ratio, % ≤		80
Note 1：In addition to the air content, the data listed in the table are the difference value or ratio between the concrete with WHDF and the concrete without WHDF; Note 2：The index of setting time: "-" sign means ahead of the time, "+" sign means delay.

This product is non-toxic,non-flammable,non-explosive and non-volatile.Store at room temperature and room pressure in the warehouse; There are no special requirements for the transportation.

Shake the product well before use; Do not mix the WHDF stock solution directly with water reducer or other admixtures.