Experimental and Numerical Studies on Flowing Properties of Grouting Mortar Based on the Modified MPS Method

Abstract

Grouting mortar has widespread application in engineering because of the advantages of good durability, low cost, and environmental friendliness. To study the flowing properties of grouting mortar, laboratory minislump tests taking different rheological parameters of grouting mortar into consideration were conducted to obtain the flow time and flow pattern of grouting mortar. A modified MPS method (moving-particle semi-implicit method) introduced two sections of Bingham rheological, and segregation was proposed. The effects of the plastic viscosity on the flow state of mortar were studied, and the relationship between the plastic viscosity and the flowing time was established. The numerical results show that the modified MPS method can be used to predict the flow time and flow pattern of mortar in the template, and plastic viscosity has a great influence on the flow time of concrete, and with the increase of plastic viscosity, the time to flow to the specified area also increases. Moreover, the analysis of the rheological parameters can provide the basis for the design of mix ratio in the construction practice.

Applicability of Numerical Simulation by Particle Method to Unconfined Compression Tests on Geomaterials

“…The precision of a simulation depends on the correct rheology and may require the use of the modified Bingham fluid model to explain the complex rheological behavior [20,21]. Soil is comparable to concrete or mortar in terms of its flowability, and thus, the flowability values of these materials are often used as a reference when determining the plastic viscosity value [22,23]. Aierken et al [22] explained the compatibility of bi-viscosity Bingham fluid in a mortar flow simulation.…”

“…Soil is comparable to concrete or mortar in terms of its flowability, and thus, the flowability values of these materials are often used as a reference when determining the plastic viscosity value [22,23]. Aierken et al [22] explained the compatibility of bi-viscosity Bingham fluid in a mortar flow simulation. Shakya et al [23] suggested the extrapolation of the flow value vs. plastic viscosity, and the plastic…”