What is ASTM C266?
ASTM C266, 2021 Edition, October 1, 2021 – Standard Test Method for Time of Setting of Hydraulic-Cement Paste by Gillmore Needles. This test method covers the determination of the time of setting of hydraulic-cement paste by means of the Gillmore needles. The values stated in SI units are to be regarded as standard.
What is Gilmore needle?
Gillmore (1825–1888), American engineer] A device which uses a penetration test to measure the difference between the initial and final setting time of dental cement. A ¼ pound needle is used for determining the initial set and a one pound needle is used for defining the final set.
What is Gillmore Test?
Gillmore Needle Apparatus is used to determine initial and final set times of Portland cement, masonry cement, hydraulic hydrated lime, and certain mortars in accordance with ASTM C266 and other standards.
What is a Gilmore apparatus?
The Gillmore apparatus is used to determine the setting time of cement. The apparatus consists of two horizontal arms that carry two weight steel needles that are calibrated to meet the specifications.
What is Vicat needle test?
The Vicat test is used for testing materials that have no real melting points. The main principle is that it measures the temperature at which a flat ended needle is able to penetrate the sample. This is known as the softening point of the material.
What is Vicat needle apparatus?
Definition of Vicat apparatus : a device for determining the normal consistency and time of setting of portland cements that consists of a rod weighing 300 grams, having a needle in each end, and supported in a frame with a graduated scale to measure the distance to which the needle penetrates the cement.
What is the diameter of Vicat needle?
1.13 mm
The probe weighs 300 g (1000 g AFNOR) and needle diameter is 1.13 mm (1 mm ASTM). The equipment performs a complete penetration cycle in 30 seconds or at intervals of 1 – 5 – 10 – 15 – 30 minutes between penetrations.
What is ASTM C1116?
ASTM C1116/C1116M, Revision 10A, December 1, 2010 – Standard Specification for Fiber-Reinforced Concrete. This specification covers all forms of fiber-reinforced concrete that are delivered to a purchaser with the ingredients uniformly mixed, and that can be sampled and tested at the point of delivery.
What is ASTM c780?
ASTM C 780 is a field test method which defines standard procedures for sampling and testing mortars before and during their use in construction. Mortars can be tested to determine composition or to obtain their plastic and harden properties.
What is ASTM C91?
ASTM C91, the Standard Specification for Masonry Cement, defines requirements for three classifications of masonry cement: Type N – For use in preparation of ASTM C270 Type N mortar. Type S – For use in preparation of ASTM C270 Type S mortar without further addition of cements or hydrated lime.
What is Vicat plunger?
Vicat’s apparatus consists of an arrangement to hold the plunger of 10 mm diameter and two other needles which are made to freely fall into a mold filled with the cement paste and the amount of penetration of the needles of plunder can be noted using the vertical graduations from 0 mm to 50 mm.
What is Vicat needle?
What is Gillmore needle apparatus?
Questions? Gillmore Needle Apparatus is used to determine initial and final set times of Portland cement, masonry cement, hydraulic hydrated lime, and certain mortars in accordance with ASTM C266 and other standards. The adjustable support has horizontal arms to guide two weighted needles with flat-end cylindrical stainless steel tips.
What is the weight of the needle in the apparatus?
The apparatus consists of two horizontal arms which carry two weighted steel needles precisely machined to meet5 the requirement. The initial needle 2.12 mm dia., weighs 113 g and the final needle 1.06 mm dia., weighs 453,6 g.
What is the size of initial set and final set needle?
In testing the molded specimen for the time of setting, the initial-set needle is 1/4lb (113.4g) and 1/12in (2.12mm) diameter. Final-set needle is 1lb (453.6g) and 1/24in (1.06mm) diameter.