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CONCRETE PRODUCERS

The use of Xypex Admix is part of an integrated value engineering approach that can be the key to expanding your markets and profitability.

Xypex FAQ

01.
Can Xypex Admix be used in concrete containing fly ash, micro-silica or slag cement?

Yes. Xypex Admix is very effective when used in modern mix designs that incorporate cementitious replacement materials i.e. fly ash, silica fume and blast furnace slag. The reactions that take place to form the crystalline structure are very complex. During the cement hydration process, Xypex’s active chemicals not only react with calcium hydroxide and unhydrated cement particles but also with various metal oxides and mineral salts, regardless of the cement type used. Consult with a Xypex representative to determine dosage rates for such blended cement mix designs.

02.
Are there any limitations that affect the performance of Xypex Admix?

Use of Xypex Admix requires a minimum of 10% Portland cement content. Of course, optimum effectiveness will be dependent on a number of factors such as thickness of the concrete, Portland cement content, whether there is sufficient reinforcing steel for strength and crack control, quality of placing and finishing practices, sealing of construction joints etc. Typically, Xypex requires a minimum concrete thickness of 5 cm (2”) and a minimum design strength of 20 MPa (3000 psi).

03.
What is the difference between the various additives in Xypex’s Admix C-Series?

The Admix C-Series has been specially formulated to meet varying project and temperature conditions. Xypex Admix C-500 is specifically formulated to meet modern concrete practices that incorporate additives such as fly ash and slag. For most concrete mix designs adding the Admix C-500 will have minimal or no effect on setting time. Xypex Admix C-1000 is designed for typical Portland cement-rich concrete, where normal to a mildly extended set time is desired. Xypex Admix C-2000 is designed for projects where extended set time is required due to high ambient temperatures or long ready-mix delivery times.

04.
How are the setting time and compressive strength of concrete affected by the addition of Xypex Admix?

The setting time of concrete is affected by the chemical and physical composition of ingredients, temperature of the concrete an climatic conditions. Extension of set time may occur when using Xypex Admix. The amount of extended set will depend upon the concrete mix design and the dosage rate of the Admix. Concrete containing Xypex Admix may develop higher ultimate strengths than plain concrete. Trial mixes should be carried out under project conditions to determine setting time and strength of the concrete.

05.
Is Xypex Admix available in soluble bags?

Yes. In North America, Australia, S.E. Asia and Europe, Xypex Admix is now available in soluble bags. The soluble bags provide a convenient, easy, dust-free method of installing the Admix to concrete mixes, and they are available in three sizes so as to accommodate the various dosage rates and mix design requirements.

06.
What is the recommended dosage rate for Xypex Admix?

Xypex Admix is added to the concrete mix at a dosage rate within the range of 2 – 3 % by weight of the Portland cement content. Where the “No Fines” (NF) grade is utilized, the equivalent dosage rate is 1 – 1.5 %. For assistance in determining the appropriate dosage rate for a particular project, consult Xypex technical literature or contact a Xypex technical representative.

07.
When is Xypex Admix introduced into the concrete mix

Xypex Admix is added to the concrete mix at time of batching. The sequence of procedures for addition of the Admix powder will vary depending on the type of batch plant operation and equipment e.g. ready-mix plant (dry batch operation), ready-mix plant (central mix operation), or pre-cast batch plant.

08.
What are the key benefits of Xypex for Concrete Producers?
  • Technical support is tailored to your needs
  • Maximize your profit per unit
  • Create a branded waterproof concrete

The unique features of Xypex Admix enable you to waterproof, protect and enhance the durability of your concrete from the start – from the moment it’s poured. Blending Xypex Admix into the concrete at the time of batching can also provide better cost control. Construction schedules can be accelerated and cost savings realized by eliminating most of the time and labour costs associated with traditional waterproofing methods.