Forney Gillmore Test Apparatus LA-4160
Used to determine the initial and final setting time of hydraulic cement paste using Gillmore needles. Unit consists of a base, support shelf, two (2) horizontal arms and two (2) metal balls with needles.
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Humboldt Acme Penetrometer H-4143
Hydraulic reaction-type apparatus for determining the time of setting
of concrete with slump greater than zero by testing mortar sieved
from the concrete mixture. Unit also determines effects of variables
such as temperature, cement, mixture proportions, additions and
admixtures upon the time of setting and hardening of concrete.
Penetrometer’s new design makes it easier to operate, more
efficient, with a longer gear rack. All needles are one length so
settings may remain the same. Loads are applied hydraulically with
pressures read on a 200 lbf (890N) capacity gauge graduated in
2 lbf divisions. Set of six needles allow multiplication to maximum
8000 lbf. reading.
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Humboldt Concrete Pocket Penetrometers H-4132
Lightweight, spring-reaction type concrete penetrometer for field and
lab evaluation of the initial set of concrete mortar based on ASTM
C403. Penetration plunger has a 1/20 sq. in. tip area. Plunger is
steadily pushed into the mortar to a 1 in. depth, as indicated on the
shaft, at periodic time intervals. Penetrometer’s calibrated range is
0-700psi. Resistance in psi is indicated on the scale. The term “initial
set” is the semi-hardened, partially hydrated condition of the concrete
beyond which it can no longer be worked. The point of initial set is
reached when the penetration value is 500psi. Meets ASTM C780.
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Gilson Acme Penetrometer HM-570
Model HM-570 Acme Penetrometer and Model HM-571 Mortar Penetration Apparatus are used to determine setting times of concrete mixes by measuring the penetration resistance. Suitable for lab and field testing, both are also ideal for testing prepared mortars and grouts.
A mortar sample, sieved from fresh mix, is placed in a container and stored at a specified temperature. It is tested at regular intervals with standard penetration needles. Resistance is plotted to determine initial (500 psi) and final (4000 psi) setting times.
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