[DOC] [TLE] Materials - Colosseum [PAR] Tiles and bricks were produced with clay mixed with water and often with sand, 
straw ... Roman Cement (most of the info from Benjamin Herring "The secrets of ... 
One was made with simple lime and river sand, mixed at a ratio of three parts ... 
The other type used pozzolana instead of river sand and was mixed at a ratio of... [DOC] [TLE] The Secrets of Ancient Rome's Buildings | History | Smithsonian [PAR] Nov 16, 2011 ... What this material is assumed to have is phenomenal resistance ... Modern 
concrete is a mix of a lime-based cement, water, sand and ... and then packed 
into place to form structures like walls or vaults. ... But combining a mortar with an 
aggregate like brick to make concrete was likely a Roman invention,... [DOC] [TLE] Building material - Wikipedia [PAR] Wet-laid, or damp, walls are made by using the mud or clay mixture directly 
without forming blocks and drying them first. The amount of and type of each 
material... [DOC] [TLE] Concrete - Wikipedia [PAR] Concrete is a composite material composed of coarse aggregate bonded 
together with a fluid ... The cement reacts chemically with the water and other 
ingredients to form a ... Today, concrete is the most widely used man-made 
material (measured by .... The mix design depends on the type of structure being 
built, how the... [DOC] [TLE] concrete - Infoplease [PAR] concrete, structural masonry material made by mixing broken stone or gravel with 
... The concrete of the Romans, formed by combining pozzuolana (a volcanic 
earth) ... be roofed without lateral thrusts by vaults cast in the rigid homogeneous 
material. Scientifically proportioned concrete formed with cement is an invention 
of... [DOC] [TLE] Roman Building Materials, Construction Methods, and ... - TigerPrints [PAR] The materials used, construction techniques employed, and architectural ... 35-
104, became water commissioner of Rome after serving as a military governor in 
.... Arches and Vaults . ..... of empire due to the type of building it produced. ..... 
this paper, but even though the Romans did not invent the arch, they made 
significant... [DOC] [TLE] Waterproof concrete | Article about Waterproof concrete by The Free ... [PAR] Scientifically proportioned concrete formed with cement is an invention of modern 
... sand, and five parts of broken stone or gravel, with the proper amount of water 
for a ... as vaults, domes, and triumphal arches, the ancient Romans used 
concrete, and ... According to the type of binding agent used, light concretes 
made with... [DOC] [TLE] A historical examination of concrete - EU Bookshop [PAR] make superior concretes which, upon hardening, contained complex 
cementitious hydrates ... Portland cement was not invented until 1824 or later and 
consists principally of calcium ... deep cores from the concrete core of Hadrian's 
Wall. ... The Greeks and the Romans chose their materials ..... lime, sand, gravel 
and water. [DOC] [TLE] Glossary of Structural Engineering Terms | Aleck Associates Ltd ... [PAR] Aircrete: A lightweight aerated cement-based material from which easily ... Bond: 
The arrangement or pattern of bricks (or other masonry units) in a wall. .... Roman 
concrete was based, not on Portland cement, but on a 'pozzolanic' mix, made .... 
Fletton: The common type of machine-made yellow/orange frogged brick used... [DOC] [TLE] Patent US7867432 - Load bearing insulation and method of ... [PAR] Jan 11, 2011 ... A building material which comprises cement, cellulose fibers and ... Publication 
type, Grant ... composition is made up of between about 70-74% by weight water, 
... present invention relates generally to an insulating building material .... by 
forming a wall of blocks made from the material described herein;... [DOC] [TLE] basic concrete - Technical Learning College [PAR] Nov 21, 2013 ... hoppers, vaults, and pits are spaces that may have limited means of entry). 3. .... 
fundamentals of cement or concrete products, types, purposes, slump, .... 
concrete is the most widely used man-made material (measured by tonnage ...... 
percentage of

Question: For walls & vaults, the Romans invented a superior type of this material made of cement, water & gravel
Answer: Concrete