Batimix Silica Fume DG3-P

Description

Batimix Silica Fume DG3-P is a powder silica fume pozzolanic additive used in dry-mix shotcrete applications.

Main Purpose

When added to the shotcreting mix, the ultra-fine particles of Batimix Silica Fume DG3-P significantly improve the particle packing by physically filling the voids in the cement paste. This leads to more densified shotcrete skeleton with reduced level of bleeding. On the other hand, this product reacts chemically with the calcium hydroxide present in the cement paste, yielding a calcium silicate hydrate gel that significantly enhances strength, water/chloride impermeability, and durability.

Applications using Batimix Silica Fume DG3-P include all types of high strength and specialty shotcreting and repair applications.

Features

Shotcrete prepared with Batimix Silica Fume DG3-P are characterized by the following:

In the plastic state:

• Better cohesiveness with less bleeding and segregation

In the hardened state:

• Increased compressive and flexural strengths at all ages
• Greatly reduced permeability against water and aggressive chemicals
• Increased resistance to abrasion and erosion
• Improved durability and better surface quality

Properties

• Appearance : grey powder
• Bulk density : around 470 kg/m³
• Amorphous SiO₂: 85 – 98%
• Average particle diameter: 0.1 – 0.15 micron

Health and Safety

Batimix Silica Fume DG3-P is not a hazardous material. However, it should not be swallowed or come into contact eyes. Suitable goggles should be worn. For additional information, kindly refer to the product’s Material Safety Data Sheet.

Compliance with Standards

Batimix Silica Fume DG3-P complies with the requirements of ASTM C1240 and ASTM C 1141 Type I, Grade 3, Class B specifications.

Dosage Rates

Batimix Silica Fume DG3-P is normally used at the rate of 5 to 12% of the cement weight. Trials tests are recommended using the actual mix composition with site materials, in particular if dosages greater than 10% of the cement weight are to be used.

Shotcrete containing Batimix Silica fume DG3-P may be applied in the same manner as conventional dry mix shotcrete. However, special emphasis should be given to the finishing and curing operations. Proper curing methods such as continuous moist curing or liquid compound membranes should be implemented for a minimum of 7 days.

For indication purposes, the compressive strengths after 28 days of mortar made with 0.50 W/C and various percentages of Batimix Silica Fume DG3-P (0%, 5%, and 10%) will average about 27, 30, and 34 MPa, respectively.

Effect of Overdosing

An overdose of Batimix Silica Fume DG3-P will result in a highly sticky and viscous mortar with significantly reduced workability. This likely will require the use of more superplasticizer for a given workability, which in turn may result in significant set retardation. Furthermore, the mortar may become difficult to finish requiring special finishing and curing procedures.

Compatibility

Batimix Silica Fume DG3-P is compatible with all other Batimix admixtures incorporated in the same mortar. Mixtures based on Portland cement with or without replacement materials such as fly ash and blast furnace slag are also fully compatible with Batimix Silica Fume DG3-P.

Dispensing

Batimix Silica Fume DG3-P is introduced in the mortar in a similar manner and at the same time as Portland cement or any other cementitious material such as fly ash or blast furnace slag. Because of its ultra-fine particles, the mixing time should generally be increased to ensure effective dispersion throughout the mass mortar.

Technical Support

Holderchem provides, upon request, technical advisory services pertaining to mix design, admixture selection, and materials evaluation.

Storage

Batimix Silica Fume DG3-P has a minimum shelf life of 12 months, if kept unopened and stored at temperatures ranging from 2 to 50 ⁰C.

Packages

• 1 t big bag
• 50 kg paper bag
• 25 kg paper bag