'hardening agent' is a correct and usable phrase in written English.
It is commonly used in contexts related to chemistry or materials engineering, to refer to any substance used to strengthen or harden another material. For example: "The manufacturer added a hardening agent to the cement to increase its strength."
Epoxy resin Larit285 (viscosity of 600 900 mPa s) with hardening agent H285 (viscosity of 50 100 mPa s) was used as the polymer matrix.
Monolithic porous carbon (MPC) was synthesized by a templating method using Na2CO3 as template, novolac-type phenolic resin as carbon precursor and hexamethylenetetramine as hardening agent.
Two epoxy coatings are considered, which only differ by the hardening agent.
The uses of H2SiF6 are various such as metal refinement, soil hardening agent, surface treatment agent, sterilizer and water system purification.
Deep mixing and jet grouting with cement hardening agent are widely used techniques for soft ground stabilization.
In order to prepare nanocarbon/epoxy MCMs, nanocarbon fillers were incorporated into epoxy resin Larit 285 (viscosity of 600 900 mPa s) with H285 (viscosity—50 ÷ 100 mPa s, amine number 480 ÷ 550 mgКOH/g) as a hardening agent.
They include hardening agents produced when alloy steels are heated in an atmosphere of ammonia, a process called nitriding.
It proposes inflating a large hemp tarp into a bubble shape, then spraying it with liquid concrete or other hardening agents.
Another worry is that China opted not to use expensive chemical hardening agents for the concrete viaducts, which could result in their showing premature wear and tear.
A person with ties to the ministry said that the concrete bases for the system's tracks were so cheaply made, with inadequate use of chemical hardening agents, that trains would be unable to maintain their current speeds of about 217 miles per hour for more than a few years.
Different core samples were made by mixing these resins and their hardening agents with a sand sample provided from the Ahwaz and Mansoori oil fields in various percentages.
