[MIRROR] conk rete (ABLE TO BE MERGED) (#13467)

* conk rete

* Update flooring_premade.dm

* Update wall_types.dm

* Update _materials.dm

* Update plasteel.dm

* Update steel.dm

* Update stone.dm

* Update stone.dm

* Update instant.dm

* Update plasteel.dm

* Fixes map changes

Co-authored-by: Greenjoe12345 <33647525+Greenjoe12345@users.noreply.github.com>
Co-authored-by: C.L <killer65311@gmail.com>

code/modules/reagents/reactions/instant/instant.dm

@@ -689,6 +689,15 @@
 	required_reagents = list("liquidcarpeto" = 2, "plasticide" = 1)
 	carpet_type = /obj/item/stack/tile/carpet/oracarpet
 
+/decl/chemical_reaction/instant/concrete
+	name = "Concrete"
+	id = "concretereagent"
+	required_reagents = list("calcium" = 2, "silicate" = 2, "water" = 2)
+	result_amount = 1
+
+/decl/chemical_reaction/instant/concrete/on_reaction(var/datum/reagents/holder, var/created_volume)
+	new /obj/item/stack/material/concrete(get_turf(holder.my_atom), created_volume)
+	return
 
 /* Grenade reactions */
 
@@ -1232,4 +1241,4 @@
 	id = "spidertoxin_neutral"
 	result = "protein"
 	required_reagents = list("enzyme" = 1, "spidertoxin" = 1, "sifsap" = 1)
-	result_amount = 1
+	result_amount = 1