C/CM – 16 Standard Test Method for Autoclave Expansion of Hydraulic Cement, autoclave, autoclave expansion, expansion, hydraulic cement. tion statements, see the section on Safety Precautions. 2. Referenced Documents . ASTM Standards: C Test Method for Normal Consistency of Hydraulic. Qty. Model, Description. 2, H, Two-gang prism mold. 1, H, Replacement gauge studs, pack of 1, H, Trowel. 1, Choose One: H- , Cement.

Author: Shajas Gronris
Country: Liberia
Language: English (Spanish)
Genre: Spiritual
Published (Last): 13 May 2018
Pages: 496
PDF File Size: 3.59 Mb
ePub File Size: 12.29 Mb
ISBN: 489-5-16729-152-1
Downloads: 58390
Price: Free* [*Free Regsitration Required]
Uploader: Akirr

ASTM C / CM – 16 Standard Test Method for Autoclave Expansion of Hydraulic Cement

Fly ash is a by-product of coal-fired power generation. It is vitally important to follow the correct method and to use appropriate, properly serviced equipment. The most common tensile strength test on cement is conducted by the application of uniaxial tension.

The equipment required for this method includes an autoclave, test bar moulds, mixing equipment, a balance and a length comparator. The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email.

Errors or failures in the construction sector can be extremely dangerous and expensive. This test covers the autoclave expansion of Portland cement by means of a test on a neat cement specimen.

Magazine Articles Testing cement for quality and reliability. As such, soundness is an extremely important test. Specimens are formed in an oil covered mould with reference points attached at a reference length of mm.

ast, The applicable standards for Compressive Strength are: This test is carried out by moulding cement-sand mortar briquettes, which are placed in a machine that can asstm a tension load. However, as it is a manufactured material created by a complex process aztm involves multiple ingredients, testing is essential to ensure compliance with specification and application-specific requirements.


The flow of the mix is the asttm increase in diameter of spread mix over the base diameter of the moulded mix. If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password.

This should be short enough that construction activity can be resumed within a reasonable time after the placement of concrete. Webprint Printed and bound. The tensile strength is calculated by measuring the load required to split the sample in qstm over the section of the fracture.

A cement paste or mortar mix is placed in a mould of defined volume and dimensions, and the mould is placed on top and in the centre of a flow table apparatus, where the sample is formed and compacted. The Blaine Apparatus is employed for this test and consists of a permeability test cell, a perforated disk, a plunger, filter awtm, a manometer U-tube, manometer liquid, reference cement and a timer.

Consistency is measured by the Vicat test, which provides both initial and final setting times — measurements that can be regarded as the two stiffening states of the cement. An alternative method is the flexure test, in which a mortar beam is loaded between two supports to apply a bending stress; which causes the fibres in the lower half section of the beam to develop asstm stresses, until failure occurs. The initial setting time is defined as the time taken for the Vicat needle to be able to penetrate the paste in the mould to a depth of 5mm.


The compressive strength of the cubes is determined by the highest stress applied to a cube specimen that causes it to fracture.

Two gang prism mould 25x25x285 mm to ASTM

Un-soundness can arise from the presence of too much free magnesia or hard-burned free lime in the cement. This ensures that you are always up-to-date and saves you both time and money.

Compressive strength is one of the most important properties of concrete and mortar. After the heating is complete, the specimen is measured and compared to the original length measurements.

Testing cement for quality and reliability. ELE supplies a variety of devices for this method, including the drying, shrinkage and moisture movement apparatus, as well as the ASTM length comparator.

The beginning of solidification, or the initial set, marks the point in time when the paste has become unworkable, and the time taken to completely solidify marks the final set. Alternatively, soundness of cement can be determined by the autoclave method. The tensile strength of cement is relatively low when compared to its compressive strength. Read more about subscriptions. During combustion, mineral impurities in the pulverised coal are expelled from the combustion chamber in the form of fused particles in suspension with the flue gases.