A comparison of flexural strengths of polymer (SBR and PVA) modified, roller compacted concrete
This brief article aims to reveal the flexural performance, including the equivalent flexural strength of PVA (Polyvinyl Alcohol) modified concrete by comparing it primarily with that of SBR (Styrene Butadiene Rubber) concrete. This data article is directly related to Karadelis and Lin [6].
Roller compacted sheets of polymer modified mortar
Abstract The strength development of a polymer modified mortar (PM mortar) compacted by rolling into sheets has been investigated and the test results include modulus of rupture, compressive strength and also bond strength when rolled onto a concrete surface at ages from 3 to 120 days. The mortar contained Ordinary Portland Cement (OPC), Pulverized Fuel Ash (PFA), fine sand, Polyvinyl Alcohol (PVA), and sometimes in addition Styrene Butadiene (SB) latex and silica fume slurry. As expected a mechanical roller provided the highest strengths with MOR values up to 26 MPa compared with up to almost 17 MPa for hand rolling. The forms of failure for cube specimens tested either parallel to or perpendicular to the as-rolled direction were the same; thus the adhesion between the layers was very good. The bond strength development for the PM mortar to concrete correlated well with the cube strength development. The highest bond strength of about 12 MPa was obtained with 8% PVA by weight of cement. However, inclusion of between 5–10% PVA by weight of cement only had a small effect on the bond strength between PM mortar and steel. The average bond strength value from Pull Out tests for plain steel bars was of the order of 5 MPa. The high bond strength to concrete as well as the high tensile strength shows that the PM mortar is especially suitable for enhancing the strength of concrete members in a repair situation, particularly in the form of ferrocement in which reinforcement is sandwiched between adjacent sheets of PM mortar.
The Millennial of Castile (1943): the historical culture of Spanish Fascism
Abstract The creation of new symbols and historical myths were common practices of nationalist politics, especially in Fascist regimes. In 1943 the Franco regime organized the most impressive historical commemoration celebrated in post-war Spain: the Milenario of Castile. With its heterogeneous mixture of history and spectacle, the Milenario of Castile was by far the greatest historical commemoration promoted by the State during the 1940s. Taking the commemoration of the Milenario as a case study, this article examines the historical culture of Spanish Fascism, as well as the attempts of the Falangist intellectual elite to impose a concrete national narrative in post-war Spain. At the same time, the article analyses the historical discourses and aesthetics displayed throughout the commemoration, underlining its Fascist character, and consequently the transnational dimension of the Fascist politics of the past. Finally, the article reflects on the scope and limits of the process of Fascistisation in Franco's dictatorship, especially in its commemorative culture.