Study of Early Age Stiffness Development in Lime–Cement Blended Mortars

Ramesh, Meera; Azenha, Miguel

doi:10.1007/978-3-319-99441-3_42

Cited by 6 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The feasibility of E-modulus obtained from EMM-ARM was examined using the conventional method of unconfined cyclic compression test according to EN 12390-13 [31], for the mix 1C1L6S (50% lime in the binder). A detailed description of the set up may be found in reference [45]. In order to ensure similar curing conditions, the specimens used for cyclic compression were kept sealed up to the time of testing.…”

Section: Comparison Of Results Of Emm-arm With Cyclic Compression Testmentioning

confidence: 99%

Mechanical properties of lime–cement masonry mortars in their early ages

Ramesh

Azenha

2019

Mater Struct

Self Cite

View full text Add to dashboard Cite

Lime-cement mortars are often used in restoration of existing buildings (especially twentieth century onward) as well as new constructions, in order to combine the individual strengths of either type of binder. Despite the knowledge that mortars have a significant impact on the non-linear mechanical behaviour of masonry from the earliest moments of construction, literature that systematically quantifies the impact of adding lime to cement mortars, or vice versa is scarce and scattered. This work is therefore focussed on bridging the research gap that exists in lime-cement masonry mortars with regard to their mechanical properties in the early ages (up to 7 days of curing). Five different mix compositions have been studied with 1:3 binder-aggregate ratio and 10% to 75% lime content in the binder, both by volume. Changes in properties like mechanical strength and stiffness along with ultrasound pulse velocity have been quantified, correlated and associated with change in quantity of lime in the binder (by volume) of the mortar. It was found that every 10% increase in the quantity of lime in the binder led to a 14% decrease in mechanical strength and a corresponding 12% decrease in stiffness, at 7 days of curing age. Emodulus was found to evolve faster than flexural strength, which in turn was found to evolve faster than compressive strength. Impact of curing temperature and the concept of activation energy has been addressed for the mix 1:1:6 (Cement: Lime: Sand).

show abstract

Section: Comparison Of Results Of Emm-arm With Cyclic Compression Testmentioning

confidence: 99%

Mechanical properties of lime–cement masonry mortars in their early ages

Ramesh

Azenha

2019

Mater Struct

Self Cite

View full text Add to dashboard Cite

show abstract

“…Static Young's modulus was measured for three mixes with binder-aggregate ratio 1:3, at curing ages of 7, 28 and 90 days using the method of unconfined cyclic compression test adapted from EN 12390-13:2013 for concrete and cement based materials [29]. A pre-load of 50 N was applied on all specimens, followed by four cycles of loading and unloading, each ramp lasting 60 seconds and reaching a maximum load of one-third of the maximum compressive strength of the mix at that age [30]. This value of maximum uniaxial unconfined compressive strength was attained by testing three cylindrical (diameter 60 mm, height 120 mm) specimens at each age prior to measuring E-modulus, using displacement control at a rate of 0.012 mm/s.…”

Section: Details Of Experimentsmentioning

confidence: 99%

Quantification of impact of lime on mechanical behaviour of lime cement blended mortars for bedding joints in masonry systems

Ramesh

Azenha

Lourenço

2019

Construction and Building Materials

Self Cite

View full text Add to dashboard Cite

“…Other studies [30] on lime-cement mortars investigated the effect of temperature on curing at an early age for different lime contents, pointing out how high temperature during curing increases the reactivity of the mix and shortens the dormant period of cement.…”

Section: Emm-arm In the Literaturementioning

confidence: 99%

“…Some applications of EMM-ARM are available in the literature focused on the assessment of the effect of operating temperature on CEM I and CEM II cement-based materials [22,26,30]. In this work, the effect of different curing temperatures on the early age mechanical properties of pozzolanic CEM IV/B cement paste was investigated by means of the EMM-ARM methodology considering two temperature values equal to 15 • C and 20 • C, the latter assumed as control value, in order to simulate different operating scenarios.…”

Section: Effect Of Temperaturementioning

confidence: 99%

Experimental Study about the Influence of Storage Conditions of Bulk Cement on the Early-Age Stiffness Evolution of Cementitious Pastes

Cieri,

Cassese,

Fabbrocino

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

The effects of uncontrolled storage and curing temperature on the early-age mechanical behavior of cement are under-investigated issues, and the few available studies in the literature analyze their influence mainly from a chemical-physical point of view. The present study, on the contrary, aims at studying the effects of temperature and, above all, cement prehydration due to uncontrolled storage from a phenomenological perspective through the application of the EMM-ARM method. In particular, the influence of those factors on the early-age evolution of the Young’s modulus of cement pastes produced from Portland as well as pozzolanic cement is experimentally assessed. The obtained results confirm the possibility of exploiting the EMM-ARM method to characterize those effects on a phenomenological basis, sorting back to the comparison of the curves of prehydrated cement with reference ones in controlled storage conditions. As a result, the methodology shows promising applicative perspectives for acceptance checks of the materials before use.

show abstract

Study of Early Age Stiffness Development in Lime–Cement Blended Mortars

Cited by 6 publications

References 8 publications

Mechanical properties of lime–cement masonry mortars in their early ages

Mechanical properties of lime–cement masonry mortars in their early ages

Quantification of impact of lime on mechanical behaviour of lime cement blended mortars for bedding joints in masonry systems

Experimental Study about the Influence of Storage Conditions of Bulk Cement on the Early-Age Stiffness Evolution of Cementitious Pastes

Contact Info

Product

Resources

About